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Finding the Fourth Proportional to 394,874.77, 592,311.70 and 128,634.86

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Solution

The fourth proportional to 394,874.77, 592,311.70 and 128,634.86 is: 192,952.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,874.77 : 592,311.70 = 128,634.86 : x
  2. Step 2: Convert to fraction form
    394,874.77/592,311.70 = 128,634.86/x
  3. Step 3: Cross multiply
    394,874.77x = 592,311.70 × 128,634.86
  4. Step 4: Simplify right side
    394,874.77x = 76,191,932,605.86
  5. Step 5: Solve for x
    x = 76,191,932,605.86/394,874.77
  6. Step 6: Final answer
    x = 192,952.14

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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.