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Finding the Fourth Proportional to 399,311.67, 551,034.33 and 218,031.24

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Solution

The fourth proportional to 399,311.67, 551,034.33 and 218,031.24 is: 300,874.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,311.67 : 551,034.33 = 218,031.24 : x
  2. Step 2: Convert to fraction form
    399,311.67/551,034.33 = 218,031.24/x
  3. Step 3: Cross multiply
    399,311.67x = 551,034.33 × 218,031.24
  4. Step 4: Simplify right side
    399,311.67x = 120,142,698,252.47
  5. Step 5: Solve for x
    x = 120,142,698,252.47/399,311.67
  6. Step 6: Final answer
    x = 300,874.50

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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.