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Finding the Fourth Proportional to 275,115.98, 379,655.24 and 154,256.90

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Solution

The fourth proportional to 275,115.98, 379,655.24 and 154,256.90 is: 212,871.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,115.98 : 379,655.24 = 154,256.90 : x
  2. Step 2: Convert to fraction form
    275,115.98/379,655.24 = 154,256.90/x
  3. Step 3: Cross multiply
    275,115.98x = 379,655.24 × 154,256.90
  4. Step 4: Simplify right side
    275,115.98x = 58,564,440,391.16
  5. Step 5: Solve for x
    x = 58,564,440,391.16/275,115.98
  6. Step 6: Final answer
    x = 212,871.82

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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.