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 two ratios and set the products equal to each other.

Front

If 4 big water bottles hold 8 gallons, how much does 1 big water bottle hold?

Back

2 gallons.

Front

If a car travels 120 miles in 3 hours, what is its speed in miles per hour?

Back

40 miles per hour.

Front

What is the formula for finding the unit rate?

Back

Unit Rate = Total Quantity / Number of Units.

Front

If 50 apples cost $25, what is the cost of 1 apple?

Back

$0.50.

Front

If there are 5 ice cream cones for every 3 brownies, what is the ratio of ice cream cones to brownies?

Back

5:3.

Front

How do you find the missing value in a proportion?

Back

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

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.

Front

If 3 big water bottles hold 6 gallons, how much does each bottle hold?

Back

2 gallons.