The ratio 512 : x is equivalent to the ratio x2 : 512. What is the value of x?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

If you could answer these your a life saver