A ratio of 1 1/2 to 1 is the same as a ratio of 3 to 2 (seasonally known as "ring ding-a-ling") which really is the same as a ratio of 6 to 4.

The ratio of 3 to 4 (otherwise known as "eat your g*d damn spinach") is also called a hemiola as musicians like to chop up the world into pieces... but *claim they aren't.