# Lesson Properties of proportions

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 This Lesson (Properties of proportions) was created by by Shruti_Mishra(0)  : View Source, ShowAbout Shruti_Mishra: I am a maths graduate from India and am currently persuing masters in Operations Research. Property 1 Product of Means = Product of Extremes Property 2 If a:x::x:b i.e. , then x is known as the mean proportion of a and b Property 3 If a:x::b:x i.e. , then x is known as the third proportion of a and b Property 4 Duplicate ratio of a:b is and sub-duplicate ratio of a:b is Property 5 Triplicate ratio of a:b is and sub-triplicate ratio of a:b is Alternando Rule a:b::c:d then a:c::b:d Componendo Dividendo Rule => Property 8 If a/b = c/d = e/f, then This lesson has been accessed 12049 times.