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Finding the Fourth Proportional to 279.28, 385.14 and 181

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Solution

The fourth proportional to 279.28, 385.14 and 181 is: 249.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.28 : 385.14 = 181 : x
  2. Step 2: Convert to fraction form
    279.28/385.14 = 181/x
  3. Step 3: Cross multiply
    279.28x = 385.14 × 181
  4. Step 4: Simplify right side
    279.28x = 69,710.34
  5. Step 5: Solve for x
    x = 69,710.34/279.28
  6. Step 6: Final answer
    x = 249.61

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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.