Can someone explain why we have to put this in a ratio like bellow The market price of a house is directly proportional to the total area of the house in square feet. If the price of a 1,500 square foot home is $300,000 what is the price of a 2,000 square foot home?

The correct answer is (B). We can solve this by setting up a proportion using the ratio of area to price:

1,500 2,000
=
300,000 x