(d) Inversion.
(e) Composition.
(f) Division.
(g) Composition and division.
(h) In a series of equal ratios, the sum of the antecedents is to the sum of the consequents etc.
(i) Like powers or like roots of the terms of a proportion etc.
6. If
write all the possible proportions that can be derived from it. [See (5) above.]
7. Given