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Finding the Fourth Proportional to 636,401.28, 878,233.57 and 349,939.92

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Solution

The fourth proportional to 636,401.28, 878,233.57 and 349,939.92 is: 482,916.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,401.28 : 878,233.57 = 349,939.92 : x
  2. Step 2: Convert to fraction form
    636,401.28/878,233.57 = 349,939.92/x
  3. Step 3: Cross multiply
    636,401.28x = 878,233.57 × 349,939.92
  4. Step 4: Simplify right side
    636,401.28x = 307,328,985,227.11
  5. Step 5: Solve for x
    x = 307,328,985,227.11/636,401.28
  6. Step 6: Final answer
    x = 482,916.98

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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.