math
posted by leigh .
A 2005 Honda minivan can travel 240 miles in the city on 4 gallons of gas. Find the amount of gas required for 360 miles of city driving. (hint: use a proportion).

Use direct proportion:
240 miles : 4 gallons
360 miles : x gallons
Cross multiply to get:
x=4*360/240 = 6 gallons