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This page provides a list of educational videos related to Solving Problems with Proportions. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Solving Problems with Proportions.
Solving proportion word problems
By Duane Habecker
This is a video about solving proportion word problems.
How to use Ratios and Proportions to Solve Real World Problems
By mrtedmartin
Instructor uses a Power Point presentation to demonstrate how to use ratios and proportions to solve problems real world problems. Unit rates are discussed and definitions are given. Solving unit rate problems are modeled and a calculator is used for computation.
Writing proportions
By Khan Academy
Some examples of writing two ratios and setting them equal to each other to solve proportion word problems
Mountain height word problem
By Khan Academy
Using some basic algebra to solve what looks like a hairy word problem that involves proportions.
Comparing population proportions 1 | Probability and Statistics | Khan Academy
By Khan Academy
For qualitative variables, the population proportion is a parameter of interest. A point estimate of the population proportion is given by the sample proportion. With knowledge of the sampling distribution of the sample proportion, an interval estimate of a population proportion is obtained in much the same fashion as for a population mean.
Speed translation | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy
By Khan Academy
This video takes us through some more advanced unit conversion problems. Here, we can see how to make multiple conversions in the same problem concerning speed. Take particular note of how the units change in each step. More importantly, note how, step by step, our units slowly change into the units we want for our final answer. If you are having trouble understanding why this happens, go to the key concept described at 2:20 in the video. Note that this only occurs when multiplying two quantities, not when adding them!
Finding average speed or rate | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy
By Khan Academy
Using the formula for finding distance we can determine Usian Bolt's average speed, or rate, when he broke the world record in 2009 in the 100m. Watch.
Example Problem - Adding and Subtracting Rational Expressions (Multi-Step)
By Khan Academy
Khan Academy presents Adding and Subtracting Rational Expressions, an educational video resource on math.
Example Problem - Adding and Subtracting Rational Expressions (Multi-Step)
By Khan Academy
Khan Academy presents Adding and Subtracting Rational Expressions, an educational video resource on math.
Geometric Vector Operations
By BrainGenie
This video from CK-12 provides an overview of basic geometric vector operations, such as addition and subtraction.
Using Tables to Explore Ratios and Rates
By TeacherTube Math
YouTube presents 64 Using Tables to Explore Ratios and Rates an educational video resource on math.
Solve equations with one rational expression (advanced)
By Khan Academy
Sal solves the following equation by first simplifying the rational expression: x^2-(x^2-4)/(x-2)=4.
Solve equations with two rational expressions
By Khan Academy
Sal solves the following equation and eliminates the resulting extraneous solution: (x^2)/(x+2)=4/(x+2).
Solve equations with two rational expressions
By Khan Academy
Sal solves the equation 5/(2x)-4/(3x)=7/18 by first finding the LCM (least common multiple) of 2x and 3x.
Solve equations with one rational expression (advanced)
By Khan Academy
Sal solves the equation (14x+4)/(-3x-2)=8.
Solve equations with two rational expressions
By Khan Academy
Sal solves the equation 4/(p-1)=5/(p+3).
