Question 1197415: A particular hybrid car travels approximately 318 mi on 6 gallon of gas. Find the amount of gas required for a 901-mi trip. Found 4 solutions by josgarithmetic, greenestamps, ikleyn, math_tutor2020:Answer by josgarithmetic(39617) (Show Source):
The solution method shown by the other tutor is valid; a student should understand how and why. But that method is awkward and likely confusing to many students.
I would treat this as a direct variation problem: the number of gallons of gas needed increases by the same factor as the number of miles:
You can put this solution on YOUR website! .
A particular hybrid car travels approximately 318 mi on 6 gallon of gas. Find the amount of gas required for a 901-mi trip.
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It is a typical problem on proportion.
After reading the problem, you write a proportion
= ,
saying that the mileage per gallon is the same in both cases (remains unchangeable).
From the proportion, you find
x = = 17.
So, having 17 gallons in your gasoline tank, you may go to the road.
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