How do you write 4 is to 16 is to 48 as a proportion in fractional notation

To write 4 is to 16 is to 48 as a proportion in fractional notation, it would be written as:

4/16 = 16/48

Simplifying each fraction:

1/4 = 1/3

Therefore, 4 is to 16 is to 48 as a proportion in fractional notation is 1/4 : 1/3.