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Finding the Fourth Proportional to 485,281.80, 727,793.10 and 148,321.80

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Solution

The fourth proportional to 485,281.80, 727,793.10 and 148,321.80 is: 222,443.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,281.80 : 727,793.10 = 148,321.80 : x
  2. Step 2: Convert to fraction form
    485,281.80/727,793.10 = 148,321.80/x
  3. Step 3: Cross multiply
    485,281.80x = 727,793.10 × 148,321.80
  4. Step 4: Simplify right side
    485,281.80x = 107,947,582,619.58
  5. Step 5: Solve for x
    x = 107,947,582,619.58/485,281.80
  6. Step 6: Final answer
    x = 222,443.09

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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.