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Finding the Fourth Proportional to 275,129.40, 379,517.28 and 172,992.96

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Solution

The fourth proportional to 275,129.40, 379,517.28 and 172,992.96 is: 238,628.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,129.40 : 379,517.28 = 172,992.96 : x
  2. Step 2: Convert to fraction form
    275,129.40/379,517.28 = 172,992.96/x
  3. Step 3: Cross multiply
    275,129.40x = 379,517.28 × 172,992.96
  4. Step 4: Simplify right side
    275,129.40x = 65,653,817,638.35
  5. Step 5: Solve for x
    x = 65,653,817,638.35/275,129.40
  6. Step 6: Final answer
    x = 238,628.87

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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.