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Finding the Fourth Proportional to 279,990.76, 419,778.78 and 169,156.84

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Solution

The fourth proportional to 279,990.76, 419,778.78 and 169,156.84 is: 253,609.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,990.76 : 419,778.78 = 169,156.84 : x
  2. Step 2: Convert to fraction form
    279,990.76/419,778.78 = 169,156.84/x
  3. Step 3: Cross multiply
    279,990.76x = 419,778.78 × 169,156.84
  4. Step 4: Simplify right side
    279,990.76x = 71,008,451,923.86
  5. Step 5: Solve for x
    x = 71,008,451,923.86/279,990.76
  6. Step 6: Final answer
    x = 253,609.98

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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.