Answer:
In order to find equivalent ratios, we would need to measure the length of the various bones in each species and then divide the length of one bone by the length of another bone. This will give us the ratio of the two bones, and if this ratio is the same in different species, it would indicate a proportional relationship.
Step-by-step explanation:
For example, if in species A, the length of the upper arm is 8 inches and the length of the lower arm is 10 inches, the ratio of the upper arm to the lower arm would be 8/10 = 4/5. If in species B, the length of the upper arm is 12 inches and the length of the lower arm is 15 inches, the ratio of the upper arm to the lower arm would be 12/15 = 4/5. Since both species have the same ratio, we can conclude that the upper arm and lower arm are proportional in both species.
Similarly, you could compare the length of the fingers to the length of the metacarpals to find if there is a proportional relationship in different species.