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Finding the Fourth Proportional to 347,791.20, 521,711.10 and 137,401.80

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Solution

The fourth proportional to 347,791.20, 521,711.10 and 137,401.80 is: 206,112.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,791.20 : 521,711.10 = 137,401.80 : x
  2. Step 2: Convert to fraction form
    347,791.20/521,711.10 = 137,401.80/x
  3. Step 3: Cross multiply
    347,791.20x = 521,711.10 × 137,401.80
  4. Step 4: Simplify right side
    347,791.20x = 71,684,044,219.98
  5. Step 5: Solve for x
    x = 71,684,044,219.98/347,791.20
  6. Step 6: Final answer
    x = 206,112.30

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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.