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Finding the Fourth Proportional to 279,936,390.40, 419,904,585.60 and 221,485,753.60

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Solution

The fourth proportional to 279,936,390.40, 419,904,585.60 and 221,485,753.60 is: 332,228,630.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,390.40 : 419,904,585.60 = 221,485,753.60 : x
  2. Step 2: Convert to fraction form
    279,936,390.40/419,904,585.60 = 221,485,753.60/x
  3. Step 3: Cross multiply
    279,936,390.40x = 419,904,585.60 × 221,485,753.60
  4. Step 4: Simplify right side
    279,936,390.40x = 93,002,883,581,711,712
  5. Step 5: Solve for x
    x = 93,002,883,581,711,712/279,936,390.40
  6. Step 6: Final answer
    x = 332,228,630.40

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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.