Given,
Athlete rides bike for 8 miles if he runs 3 miles
To find,
How far will athlete ride if he runs 4.5 miles?
Solution: - From above situation we take miles for which athlete will ride bike = X
Then the ratio will be
8:3 = x: 4.5
8/3 = x/4.5
Solving this will give 12.
Hence, athlete will ride bike for 12 miles if the athlete runs 4.5 miles.