Note 4 — PROPORTION.
Reading edition
The reader may be reminded that cross-multiplication of the factors in any such slide rule setting will give a constant product, e.g., 20 × 94·5 = 27 × 70.
Reading edition
The reader may be reminded that cross-multiplication of the factors in any such slide rule setting will give a constant product, e.g., 20 × 94·5 = 27 × 70.