The forth proportional to 100,200,300 is?  Choose the correct choice from the following answers.
A) 200 B) 600 C) 750 D) 450 E) 1000
Let the fourth proportional to 100,200,300 be x   then 100:200::300:x   100x = 200*300   x = 600   Answer is 600
<result>B</result>
The forth proportional to 100,200,300 is?