Question

If a 143-mile trip took 5 1/2 gallons of gas, how many miles can be driven with a full tank of 14 gallons?

Answer 1

Set up the proportion:    143/5.5 = x/14

Cross-multiply the proportion:  (143) (14) = 5.5 x

Divide each side by 5.5 :    x = (143) (14) / 5.5 = 364 miles