# Problem Solving Using Proportions

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The two lessons on equivalent rates allow students to solve a variety of word problems involving ratios and rates.

We also connect the concept of rates (specifically, tables of equivalent rates) with ordered pairs, use equations (such as y = 3x) to describe these tables, and plot the ordered pairs in the coordinate plane.

These lessons tie ratios in with the student's previous knowledge of bar models as a tool for problem solving.

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Some students may choose one method over another; some may be able to master all of the methods.

Most will probably choose one method they prefer for doing these conversions.

After this, we turn our attention to proportions (which is an equation of two ratios).

The lessons show how to solve proportions using cross-multiplying and how to set up proportions the correct way.

The second fraction has '390 words' in the numerator and the variable 'x' to represent the time which we have to find.

This can be written as (30 words)/(1 minute)=(390 words)/(x minutes).

## Comments Problem Solving Using Proportions

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Oct 30, 2012. You can solve ratio problems using proportions. A proportion is an equation that shows two equivalent ratios. In order to use a proportion, the.…

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Improve your math knowledge with free questions in "Solve proportions word problems" and thousands of other math skills.…

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Ingredients sometimes need to be mixed using ratios such as the ratio of water to cement mix when. This tutorial shows you how to use a proportion to solve!…

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Note This tutorial provides a great real world application of math. You'll see how to use the scale from a blueprint of a house to help find the actual height of the.…

• ###### Solving Proportion Problems Using Equivalent Ratios
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Jul 6, 2010. Ratio problems are often solved by using proportions. A proportion is an equation formed with two ratios that are equal. One method for solving.…