An equation that sets two ratios equal to each other is called a proportion. In a proportion, the cross products of the ratios are equal. For example, in the proportion ( \frac{a}{b} = \frac{c}{d} ), the cross products are ad and bc, and they are equal. Solving proportions involves finding the missing value in one of the ratios by setting up and solving a simple equation.
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Ah, honey, that's just a proportion. It's like saying two ratios are like two peas in a pod, equal and balanced. So, when you set those bad boys equal to each other, you're just solving for the missing piece of the puzzle. Easy peasy lemon squeezy!
Ratios that are equal to each other can be 3/4=75/100 or 1/4=25/100
An equation consists of two expressions that equal each other.
An equation
-- take two quantities that are equal to each other -- write them both on the same line, with an "equals" sign between them ( = ) You now have an equation.
When two expressions are equal to each other they form an equation.