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Finding the Fourth Proportional to 215,481.20, 323,740.20 and 192,671.60

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Solution

The fourth proportional to 215,481.20, 323,740.20 and 192,671.60 is: 289,470.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,481.20 : 323,740.20 = 192,671.60 : x
  2. Step 2: Convert to fraction form
    215,481.20/323,740.20 = 192,671.60/x
  3. Step 3: Cross multiply
    215,481.20x = 323,740.20 × 192,671.60
  4. Step 4: Simplify right side
    215,481.20x = 62,375,542,318.32
  5. Step 5: Solve for x
    x = 62,375,542,318.32/215,481.20
  6. Step 6: Final answer
    x = 289,470.93

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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.