Finding the Fourth Proportional to 285,305.76, 393,717.12 and 157,978.62
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Solution
The fourth proportional to 285,305.76, 393,717.12 and 157,978.62 is: 218,007.82
Step by Step Solution
- Step 1: Write the proportion equation
285,305.76 : 393,717.12 = 157,978.62 : x - Step 2: Convert to fraction form
285,305.76/393,717.12 = 157,978.62/x - Step 3: Cross multiply
285,305.76x = 393,717.12 × 157,978.62 - Step 4: Simplify right side
285,305.76x = 62,198,887,287.97 - Step 5: Solve for x
x = 62,198,887,287.97/285,305.76 - Step 6: Final answer
x = 218,007.82
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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.