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Finding the Fourth Proportional to 279,660,990.60, 419,491,485.90 and 252,451,211.40

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Solution

The fourth proportional to 279,660,990.60, 419,491,485.90 and 252,451,211.40 is: 378,676,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,660,990.60 : 419,491,485.90 = 252,451,211.40 : x
  2. Step 2: Convert to fraction form
    279,660,990.60/419,491,485.90 = 252,451,211.40/x
  3. Step 3: Cross multiply
    279,660,990.60x = 419,491,485.90 × 252,451,211.40
  4. Step 4: Simplify right side
    279,660,990.60x = 105,901,133,787,441,008
  5. Step 5: Solve for x
    x = 105,901,133,787,441,008/279,660,990.60
  6. Step 6: Final answer
    x = 378,676,817.10

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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.