antp i tried this and this is what I got

all 640 in width

1.85 - x346
1.25 - x512
1.33 - x481
1.66 - x386
1.77 - x362
2.35 - x272
2.40 - x267
4.3 - x149
1.5 - x427
16.9 - x38

thats what I got antp.