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Finding the Fourth Proportional to 323,838.20, 484,979.70 and 261,630.20

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Solution

The fourth proportional to 323,838.20, 484,979.70 and 261,630.20 is: 391,817.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,838.20 : 484,979.70 = 261,630.20 : x
  2. Step 2: Convert to fraction form
    323,838.20/484,979.70 = 261,630.20/x
  3. Step 3: Cross multiply
    323,838.20x = 484,979.70 × 261,630.20
  4. Step 4: Simplify right side
    323,838.20x = 126,885,335,906.94
  5. Step 5: Solve for x
    x = 126,885,335,906.94/323,838.20
  6. Step 6: Final answer
    x = 391,817.07

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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.