What is the meaning of open proportion?
Answer (2)
A proportion is the statement that two ratios are equal. For example: 1/4 = 2/8. An open proportion is when you use an unknowm amount in one of the ratios, for example: 1/2 = x/10. It is open because the value of x is not fixed in advance. Of course you can solve the equality for x and you will find x = 1*10/2 = 5. Then an open prortion is the equality of two ratios where one of the terms is unknwon and represented by a variable.
An open proportion is a proportion that includes an unknown variable, allowing one to solve for that variable. For instance, in the equation 2 1 = 10 x , x is the unknown, which can be found using cross-multiplication. Initially, it is termed 'open' because the value isn't fixed until solved.
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