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Finding the Fourth Proportional to 425,932.72, 638,402.28 and 320,412.40

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Solution

The fourth proportional to 425,932.72, 638,402.28 and 320,412.40 is: 480,244.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,932.72 : 638,402.28 = 320,412.40 : x
  2. Step 2: Convert to fraction form
    425,932.72/638,402.28 = 320,412.40/x
  3. Step 3: Cross multiply
    425,932.72x = 638,402.28 × 320,412.40
  4. Step 4: Simplify right side
    425,932.72x = 204,552,006,700.27
  5. Step 5: Solve for x
    x = 204,552,006,700.27/425,932.72
  6. Step 6: Final answer
    x = 480,244.88

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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.