Solving Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

Front

What does it mean if two ratios do not form a proportion?

Back

It means that the two ratios are not equivalent and do not represent the same relationship.

Front

If a recipe calls for 1 cup of sugar for every 2 cups of flour, how much sugar is needed for 4 cups of flour?

Back

2 cups of sugar.

Front

What is the cross-multiplication method?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

If 3/4 = x/8, what is the value of x?

Back

x = 6.

Front

What is the relationship between equivalent ratios?

Back

Equivalent ratios represent the same relationship and can be used to form proportions.

Front

How can you check if two ratios form a proportion?

Back

You can check by cross-multiplying and seeing if the products are equal.

Front

If 150 people wait 20 minutes, how long will 240 people wait?

Back

32 minutes.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.