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Finding the Fourth Proportional to 227,078.20, 339,961.20 and 220,517.20

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Solution

The fourth proportional to 227,078.20, 339,961.20 and 220,517.20 is: 330,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    227,078.20 : 339,961.20 = 220,517.20 : x
  2. Step 2: Convert to fraction form
    227,078.20/339,961.20 = 220,517.20/x
  3. Step 3: Cross multiply
    227,078.20x = 339,961.20 × 220,517.20
  4. Step 4: Simplify right side
    227,078.20x = 74,967,291,932.64
  5. Step 5: Solve for x
    x = 74,967,291,932.64/227,078.20
  6. Step 6: Final answer
    x = 330,138.66

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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.