Final answer:
To calculate how long it will take the marathon runner to complete the entire marathon of 26.2 miles, we can set up a proportion using the given information. By solving the proportion, we find that it will take the runner approximately 227.8 minutes to complete the entire marathon.
Step-by-step explanation:
To calculate how long it will take the marathon runner to complete the entire marathon of 26.2 miles, we can set up a proportion using the given information. We know that the runner ran the first 3 miles in 17.2 minutes. We can set up the proportion as follows:
3 miles / 17.2 minutes = 26.2 miles / x minutes
To solve for x, we can cross multiply and then divide:
x = (17.2 minutes * 26.2 miles) / 3 miles
By solving this equation, we find that it will take the runner approximately 227.8 minutes to complete the entire marathon.