Answer: The required ratio is 1 : 6.
Step-by-step explanation: We are given to find the ratio that compares 500 meters to 3 kilometers.
We know that
1 kilometer = 1000 meters.
So, 3 kilometers = 1000 × 3 meters = 3000 kilometers.
Therefore, the ratio comparing 500 meters to 3 kilometers will be

Thus, the required ratio is 1 : 6.