2 word questions for math need help?

1). In triangle DEF, the bisector of angle F divides the opposite sides into segments that are 4 and 9 in. Long. The side of the triangle adjacent to the 4 in. Segment is 6 in. Long. To the nearest tenth of an inch how long is the 3rd side of the triangle. 2). In triangle QRS, XY is parallel to SR. XY divides QR and QS into segments as follows: SX=3, XQ= 2x, RY= 4.5, and YQ = 7.5. Write a proportion to find x. What is the length of QS?