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Finding the Fourth Proportional to 394,892.34, 592,400.13 and 128,590.17

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Solution

The fourth proportional to 394,892.34, 592,400.13 and 128,590.17 is: 192,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,892.34 : 592,400.13 = 128,590.17 : x
  2. Step 2: Convert to fraction form
    394,892.34/592,400.13 = 128,590.17/x
  3. Step 3: Cross multiply
    394,892.34x = 592,400.13 × 128,590.17
  4. Step 4: Simplify right side
    394,892.34x = 76,176,833,424.72
  5. Step 5: Solve for x
    x = 76,176,833,424.72/394,892.34
  6. Step 6: Final answer
    x = 192,905.32

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1.5x scale

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.