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 unknown variable.

Front

If a car travels 280 miles in 7 hours, how far will it travel in 12 hours?

Back

480 miles.

Front

What is the unit rate?

Back

The unit rate is a comparison of any two units, expressed as a quantity of one unit.

Front

Hamburger sells for 3 pounds for $6. If Ms. Fitzpatrick buys 10 pounds of hamburger, how much will she pay?

Back

$20.

Front

What is the ratio of dogs to cats if there are 25 dogs and the ratio is 5 to 3?

Back

15 cats.

Front

How do you find a missing value in a proportion?

Back

Set up the proportion and cross-multiply to find the missing value.

Front

Mrs. Setzer ran 6 miles in 57 minutes. How many miles did she run in 19 minutes?

Back

2 miles.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division.

Front

If there were 5 ice cream cones for every 3 brownies sold, how many ice cream cones were sold if there were 24 brownies?

Back

40 ice cream cones.