These two equations represent a proportional relationship.

3
.75
=
1
.25
(
3
)
4
.6875
=
1
.25
(
3
.75
)

What is the constant of proportionality of the relationship represented in these equations?

To find the constant of proportionality, we can divide the output of the first equation by the input of the first equation:

3 / 1.25 = 2.4.

Therefore, the constant of proportionality is 2.4.