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Finding the Fourth Proportional to 410,320.80, 615,481.20 and 321,847.20

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Solution

The fourth proportional to 410,320.80, 615,481.20 and 321,847.20 is: 482,770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,320.80 : 615,481.20 = 321,847.20 : x
  2. Step 2: Convert to fraction form
    410,320.80/615,481.20 = 321,847.20/x
  3. Step 3: Cross multiply
    410,320.80x = 615,481.20 × 321,847.20
  4. Step 4: Simplify right side
    410,320.80x = 198,090,900,872.64
  5. Step 5: Solve for x
    x = 198,090,900,872.64/410,320.80
  6. Step 6: Final answer
    x = 482,770.80

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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.