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Finding the Fourth Proportional to 275,129.88, 379,517.97 and 172,993.47

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Solution

The fourth proportional to 275,129.88, 379,517.97 and 172,993.47 is: 238,629.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,129.88 : 379,517.97 = 172,993.47 : x
  2. Step 2: Convert to fraction form
    275,129.88/379,517.97 = 172,993.47/x
  3. Step 3: Cross multiply
    275,129.88x = 379,517.97 × 172,993.47
  4. Step 4: Simplify right side
    275,129.88x = 65,654,130,557.66
  5. Step 5: Solve for x
    x = 65,654,130,557.66/275,129.88
  6. Step 6: Final answer
    x = 238,629.59

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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.