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Finding the Fourth Proportional to 636,203.87, 877,939.05 and 349,721.90

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Solution

The fourth proportional to 636,203.87, 877,939.05 and 349,721.90 is: 482,603.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,203.87 : 877,939.05 = 349,721.90 : x
  2. Step 2: Convert to fraction form
    636,203.87/877,939.05 = 349,721.90/x
  3. Step 3: Cross multiply
    636,203.87x = 877,939.05 × 349,721.90
  4. Step 4: Simplify right side
    636,203.87x = 307,034,512,650.20
  5. Step 5: Solve for x
    x = 307,034,512,650.20/636,203.87
  6. Step 6: Final answer
    x = 482,603.97

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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.