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Finding the Fourth Proportional to 261,418.20, 392,516.10 and 202,320.60

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Solution

The fourth proportional to 261,418.20, 392,516.10 and 202,320.60 is: 303,781.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,418.20 : 392,516.10 = 202,320.60 : x
  2. Step 2: Convert to fraction form
    261,418.20/392,516.10 = 202,320.60/x
  3. Step 3: Cross multiply
    261,418.20x = 392,516.10 × 202,320.60
  4. Step 4: Simplify right side
    261,418.20x = 79,414,092,861.66
  5. Step 5: Solve for x
    x = 79,414,092,861.66/261,418.20
  6. Step 6: Final answer
    x = 303,781.81

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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.