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Finding the Fourth Proportional to 485,270.27, 727,905.40 and 148,311.89

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Solution

The fourth proportional to 485,270.27, 727,905.40 and 148,311.89 is: 222,467.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,270.27 : 727,905.40 = 148,311.89 : x
  2. Step 2: Convert to fraction form
    485,270.27/727,905.40 = 148,311.89/x
  3. Step 3: Cross multiply
    485,270.27x = 727,905.40 × 148,311.89
  4. Step 4: Simplify right side
    485,270.27x = 107,957,021,604.90
  5. Step 5: Solve for x
    x = 107,957,021,604.90/485,270.27
  6. Step 6: Final answer
    x = 222,467.83

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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.