Cross-multiply: Answer: She would drive 335 miles in 5 hours. Edwin
If you just know proportions, you may solve the problem, as Ewind does in his post. But you can solve it even if you don't know what a proportion is. For it, you calculate the rate first, using given distance and time rate == 67 miles per hour and then find the distance under the problem's question distance = 5*67 = 335 miles. ANSWER