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Finding the Fourth Proportional to 392,892.60, 542,195.52 and 223,127.94

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Solution

The fourth proportional to 392,892.60, 542,195.52 and 223,127.94 is: 307,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,892.60 : 542,195.52 = 223,127.94 : x
  2. Step 2: Convert to fraction form
    392,892.60/542,195.52 = 223,127.94/x
  3. Step 3: Cross multiply
    392,892.60x = 542,195.52 × 223,127.94
  4. Step 4: Simplify right side
    392,892.60x = 120,978,969,454.83
  5. Step 5: Solve for x
    x = 120,978,969,454.83/392,892.60
  6. Step 6: Final answer
    x = 307,918.68

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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.