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Finding the Fourth Proportional to 253,039.78, 379,553.59 and 82,261.27

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Solution

The fourth proportional to 253,039.78, 379,553.59 and 82,261.27 is: 123,389.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,039.78 : 379,553.59 = 82,261.27 : x
  2. Step 2: Convert to fraction form
    253,039.78/379,553.59 = 82,261.27/x
  3. Step 3: Cross multiply
    253,039.78x = 379,553.59 × 82,261.27
  4. Step 4: Simplify right side
    253,039.78x = 31,222,560,346.46
  5. Step 5: Solve for x
    x = 31,222,560,346.46/253,039.78
  6. Step 6: Final answer
    x = 123,389.93

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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.