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Finding the Fourth Proportional to 279,591.20, 419,400.62 and 79,940.96

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Solution

The fourth proportional to 279,591.20, 419,400.62 and 79,940.96 is: 119,915.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,591.20 : 419,400.62 = 79,940.96 : x
  2. Step 2: Convert to fraction form
    279,591.20/419,400.62 = 79,940.96/x
  3. Step 3: Cross multiply
    279,591.20x = 419,400.62 × 79,940.96
  4. Step 4: Simplify right side
    279,591.20x = 33,527,285,690.69
  5. Step 5: Solve for x
    x = 33,527,285,690.69/279,591.20
  6. Step 6: Final answer
    x = 119,915.38

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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.