"Spreading"/Scaling asset group without changing original asset dimensions?

IS there a way to Scale (not the ususual Shift Drag) an asset group over a larger area, but not changing the orignal individual asset sizes (freezing/locking the original size) - so the assets get spread over a upscaled general size area without increasing the original dimensions. So I guess the term would be "spreading" the assets out proportionally with frozen/locked dimensions while scaling?  Am working a star map and wish to reduce assets to 25% of their original size then scale that up to a bigger area size but not change that original size attributes while "scaling".  Essentially spreading the assets out proportionally over a larger area without changing that original 25% (smaller) size.