How do you write four is to 16 as 12 is 248 as a proportion in fractional notation

To write "four is to 16 as 12 is to 248" as a proportion in fractional notation, you would set up the ratio as follows:

4/16 = 12/248

Then simplify the fractions by dividing both the numerator and denominator by their greatest common factor, which in this case is 4:

1/4 = 3/62

So the proportion in fractional notation is 1/4 = 3/62