Question

Enter the missing value into the box to complete the ratio comparing 500 meters to 3 kilometers

Answer 1

Before I tell you the answer, note that 1 kilometer equals 1,000 meters.
So, if 1 kilometer equals 1,000 meters, that means 3 kilometers equal 3,000 meters.

So the ratio is 500:3000

But let's shrink it down:
= 1:3000/500
= 1:6