Changing image proportion

I have an image at the top of a JotForm. I'm using the Adobe Sign Widget to pass the completed form from JotForm to AdobeSign for signature.

When it is passed into Adobe Sign it is squishing the image to only ~200pixels wide but the height remains the same so it is out of proportion. I can't find a setting anywhere to fix this.

The only thing I've been able to do is to shrink the image on the form to only 200pixels wide. Then the proportion remains the same when it goes into Adobe. But now the image looks way too small on the form.

I'd like to have the image 375px wide on the form and in the PDF.

Any way to fix this?