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Finding the Fourth Proportional to 394,882.62, 592,387.11 and 128,622.66

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Solution

The fourth proportional to 394,882.62, 592,387.11 and 128,622.66 is: 192,954.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,882.62 : 592,387.11 = 128,622.66 : x
  2. Step 2: Convert to fraction form
    394,882.62/592,387.11 = 128,622.66/x
  3. Step 3: Cross multiply
    394,882.62x = 592,387.11 × 128,622.66
  4. Step 4: Simplify right side
    394,882.62x = 76,194,405,837.91
  5. Step 5: Solve for x
    x = 76,194,405,837.91/394,882.62
  6. Step 6: Final answer
    x = 192,954.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.