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Finding the Fourth Proportional to 275,133.38, 379,522.80 and 172,997

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Solution

The fourth proportional to 275,133.38, 379,522.80 and 172,997 is: 238,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,133.38 : 379,522.80 = 172,997 : x
  2. Step 2: Convert to fraction form
    275,133.38/379,522.80 = 172,997/x
  3. Step 3: Cross multiply
    275,133.38x = 379,522.80 × 172,997
  4. Step 4: Simplify right side
    275,133.38x = 65,656,305,831.60
  5. Step 5: Solve for x
    x = 65,656,305,831.60/275,133.38
  6. Step 6: Final answer
    x = 238,634.46

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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.