Ordinarily we think of a scaling factor as a ratio.
For the “Brick Antique 01” material, we want to get 58.0 inches.
The image is 384 pixels wide and the scaling s_scale of 0.01724138. The product of these values is 6.62068992.
If we then divide the pixel width by this product we get 58.0. This seems weird.
It really reduces to the the width (with a bit of floating point error) equals the reciprocal of the scale values:
pixel_width 1
inch_width = ---------------- = ---------
pixel_width * s_scale s_scale