If a 42.9ft tall flagpole casts a 253.1 ft long shadow, then how long is the shadow that a 6.2ft tall woman casts?

The women's shadow would be 36.6ft. long. 
You have to set up a proportion   42.9             6.2
                                                          =    
                                                        253.1               X
Then you cross multiply (6.2*253.1) and divide (1569.22/42.9) equals 36.6