Make a 9 patch per the layout in photo 2.
Your ratio is 1:1.5, so
3" x 4.5"
6" x 9"
etc.
If you know one block dimension and not the other:
smaller, multiply by 1.5
larger, divide by 1.5
This will give you the other dimension.
Your original cornerstones will become your vd9p focus blocks, so be aware of placement.
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This example cuts the long side first. Example is 4, subtract 1 seam allowances. Divide by 3. Add 1/4 back to that measurement. Measure to the middle from the sides, and cut.
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Leaving center in place, move left piece to right side and move right piece to left side.
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Measure your other middle section. Example is 5, subtract 1 seam allowances. Divide by 3. Add 1/4 back to that measurement. Measure to the middle from the sides, and cut.
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Again, leave center pieces in place. Move 3 right pices to left and 3 left pieces to right.
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