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Finding the Fourth Proportional to 412,920.60, 619,769.70 and 255,456.60

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Solution

The fourth proportional to 412,920.60, 619,769.70 and 255,456.60 is: 383,425.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,920.60 : 619,769.70 = 255,456.60 : x
  2. Step 2: Convert to fraction form
    412,920.60/619,769.70 = 255,456.60/x
  3. Step 3: Cross multiply
    412,920.60x = 619,769.70 × 255,456.60
  4. Step 4: Simplify right side
    412,920.60x = 158,324,260,345.02
  5. Step 5: Solve for x
    x = 158,324,260,345.02/412,920.60
  6. Step 6: Final answer
    x = 383,425.43

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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.