Because you didn't supply an incomplete ratio to compare it to, your question becomes "What ratios are equivalent to 3:1. There are infinite answers to that question! Think about finding equivalent ratios as similar to finding equivalent fractions. If you multiply both parts by the same number, you create an equivalency. For example, if we multiply both sides of the ratio 3:1 by 2, we get the equivalent ratio 6:2 (because 3x2=6 and 1x2=2). If we multiply both sides by 3, we get the equivalent ratio 9:3.
Does that help?
