500 - 240 = 260
240 divided into the ratio 53 = 4.528301886792453
$240-$260
260
760
260
The ratio is simply 720:240. You may wish to simplify that to 3:1.
The GCF is 20.
108/240 = 9/20.
Around £ 240-260
240 or 260 ft.
Halfway between them is 260.