Finding the Fourth Proportional to 445,991,774.38, 615,486,134.37 and 305,158,388.02
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Solution
The fourth proportional to 445,991,774.38, 615,486,134.37 and 305,158,388.02 is: 421,130,539.63
Step by Step Solution
- Step 1: Write the proportion equation
445,991,774.38 : 615,486,134.37 = 305,158,388.02 : x - Step 2: Convert to fraction form
445,991,774.38/615,486,134.37 = 305,158,388.02/x - Step 3: Cross multiply
445,991,774.38x = 615,486,134.37 × 305,158,388.02 - Step 4: Simplify right side
445,991,774.38x = 187,820,756,613,010,304 - Step 5: Solve for x
x = 187,820,756,613,010,304/445,991,774.38 - Step 6: Final answer
x = 421,130,539.63
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.