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Finding the Fourth Proportional to 408,331.30, 611,330.55 and 366,340.90

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Solution

The fourth proportional to 408,331.30, 611,330.55 and 366,340.90 is: 548,464.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,331.30 : 611,330.55 = 366,340.90 : x
  2. Step 2: Convert to fraction form
    408,331.30/611,330.55 = 366,340.90/x
  3. Step 3: Cross multiply
    408,331.30x = 611,330.55 × 366,340.90
  4. Step 4: Simplify right side
    408,331.30x = 223,955,383,884.50
  5. Step 5: Solve for x
    x = 223,955,383,884.50/408,331.30
  6. Step 6: Final answer
    x = 548,464.90

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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.