how do you write 5 is to 1 as 20 is to 4 as a proportion in fractional notation

To write "5 is to 1 as 20 is to 4" as a proportion in fractional notation, we can write it as:

{{{5/1 = 20/4}}}

Simplifying both sides of the equation:

{{{5/1 = 5}}}
{{{20/4 = 5}}}

Therefore, the proportion in fractional notation is:

{{{5/1 = 20/4}}}