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 4 big water bottles hold 8 gallons, how much do 3 big water bottles hold?

Back

6 gallons

Front

What is the relationship between ice cream cones and brownies sold if there are 5 cones for every 3 brownies?

Back

For every 3 brownies sold, 5 ice cream cones are sold.

Front

If 24 brownies are sold, how many ice cream cones are sold?

Back

40 ice cream cones.

Front

What is the formula to find speed?

Back

Speed = Distance / Time.

Front

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

Back

40 miles per hour.

Front

How long will it take to travel 200 miles at a speed of 40 miles per hour?

Back

5 hours.

Front

What does 'cross-multiplication' mean in solving proportions?

Back

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

Front

Solve for x: 2/3 = x/6

Back

x = 4.