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Finding the Fourth Proportional to 275,355.63, 379,997.32 and 154,505.86

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Solution

The fourth proportional to 275,355.63, 379,997.32 and 154,505.86 is: 213,221.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,355.63 : 379,997.32 = 154,505.86 : x
  2. Step 2: Convert to fraction form
    275,355.63/379,997.32 = 154,505.86/x
  3. Step 3: Cross multiply
    275,355.63x = 379,997.32 × 154,505.86
  4. Step 4: Simplify right side
    275,355.63x = 58,711,811,388.04
  5. Step 5: Solve for x
    x = 58,711,811,388.04/275,355.63
  6. Step 6: Final answer
    x = 213,221.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.