Resizing image without losing proportion

[thesoulartist]

I have an image (7.21x11 inches in proportion).

How do I change this to 8.5x11 inches and still keep the image in proportion.

If I change it now to 8.5x11 (by unchecking the aspect ratio) the image of the person is now too wide. 

Thanks. 

[D Fosse · Accepted solution]

I have an image (7.21x11 inches in proportion).

How do I change this to 8.5x11 inches and still keep the image in proportion.

By @thesoulartist

You can't. It's either crop, or blank sides. That's not Photoshop, that's geometry.

Unless you want to fake it with content-aware fill/scale.

[thesoulartist]

Thanks for your prompt replay. 

I came to a similar conclusion later on, after fiddling about with PS.

Content-aware might work, too. 

In the meantime, I can live with a white border.