math word problem
posted by
marko
.
a scale on a map is 1.5 in. : 200 mi. the map distance from miami to chicago is 9 in. what is the actual distance between the cities?

math word problem 
Ms. Sue
Cross multiply and solve for x.
1.5/200 = 9/x

math word problem 
marko
x= 13.5 is that right

math word problem 
Ms. Sue
Does 13.5 miles make sense to you as the distance between Chicago and Miami????

math word problem 
marko
sorry 2700 miles

math word problem 
Ms. Sue
Nope.
http://library.thinkquest.org/20991/alg/ratios.html

math word problem 
marko
1200

math word problem 
Ms. Sue
Right! It's about 1200 miles between Miami and Chicago.

math word problem 
marko
as always thanks for your help!

math word problem 
Ms. Sue
You're very welcome, Marko.