Fill in the blanks to complete the steps of this word problem: Moby can use his jetpack to travel 240 miles in 4 hours. How far can he travel in 10 hours?

If d represents the distance Moby travels, one way to write a proportion for this situation is
?
/4=d/
?
. Using cross multiplication gives us a new equation:
4/d
=4d. The final step is to divide by
?
, which tells us that Moby can travel
?
600miles in 10 hours.