Draw a dot (•) in the blank if the given numbers show a proportion and an (X) if they do not.
_____1. 3:4 = 12:16
_____2. 7:1 = 5:3
_____3. 10:5 = 72:36
_____4. 24:5 = 19:32
_____5. 20:5 = 10:28