Calculating Used Car Revenue

Let's read the problem carefully. The ratio of revenue from new car sales to used car sales is three to five. We know the total revenue from all car sales was 287,400 dollars, and we need to find the revenue from used car sales.

To solve this, let's represent the revenue using the ratio parts. We have three parts for new cars and five parts for used cars.

First, combine the terms. Three x plus five x equals eight x.

Now, divide both sides by eight to solve for x, which represents the value of one ratio part.