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References to 'proportion equation'
1. area of spherical calotte by means of chord by pahio
2. commensurable numbers by pahio
3. construction of central proportional by pahio
4. construction of fourth proportional by pahio
5. generatrices of one-sheeted hyperboloid by pahio
6. Heron's principle by pahio
7. high school mathematics by matte
8. hyperbolas orthogonal to ellipses by pahio
9. intercept theorem by pahio
10. method of integrating factors by pahio
11. power of point by PrimeFan
12. regular decagon inscribed in circle by pahio
13. truncated cone by pahio