A car can travel 75 miles on 4 gallons of gas. At this rate, how many gallons of gas are needed to travel 300 miles?

To find out how many gallons of gas are needed to travel a certain distance at a certain rate, you can use the formula:

gallons = distance / rate

In this case, the rate is 75 miles per gallon, so you can calculate the number of gallons of gas needed to travel 300 miles as follows:

gallons = 300 miles / 75 miles/gallon = 4 gallons

So 4 gallons of gas would be needed to travel 300 miles at a rate of 75 miles per gallon.