The original image has a resolution of 1000 x 618
The aspect ratio is 1000 / 618 or 1.62
The image at half the size is 500 x 309
The image at quarter the size is 250 x 154.5
The original image has a resolution of 2120 x 1415
The aspect ratio is 2120 / 1415 or 1.50
The same image at half the size is 1060 x 707.5
The same image at quarter the size is 530 x 353.75
The original image has a resolution of 580 x 751
The same image at half the size is 290 x 375.5
The same image at quarter the size is 145 x 187.5