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Finding the Fourth Proportional to 279.91, 418.17 and 181.61

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Solution

The fourth proportional to 279.91, 418.17 and 181.61 is: 271.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.91 : 418.17 = 181.61 : x
  2. Step 2: Convert to fraction form
    279.91/418.17 = 181.61/x
  3. Step 3: Cross multiply
    279.91x = 418.17 × 181.61
  4. Step 4: Simplify right side
    279.91x = 75,943.85
  5. Step 5: Solve for x
    x = 75,943.85/279.91
  6. Step 6: Final answer
    x = 271.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.