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Finding the Fourth Proportional to 399,630.92, 551,498.59 and 218,354.10

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Solution

The fourth proportional to 399,630.92, 551,498.59 and 218,354.10 is: 301,332.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,630.92 : 551,498.59 = 218,354.10 : x
  2. Step 2: Convert to fraction form
    399,630.92/551,498.59 = 218,354.10/x
  3. Step 3: Cross multiply
    399,630.92x = 551,498.59 × 218,354.10
  4. Step 4: Simplify right side
    399,630.92x = 120,421,976,475.54
  5. Step 5: Solve for x
    x = 120,421,976,475.54/399,630.92
  6. Step 6: Final answer
    x = 301,332.98

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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.