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Finding the Fourth Proportional to 186.76, 280.14 and 141.20

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Solution

The fourth proportional to 186.76, 280.14 and 141.20 is: 211.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.76 : 280.14 = 141.20 : x
  2. Step 2: Convert to fraction form
    186.76/280.14 = 141.20/x
  3. Step 3: Cross multiply
    186.76x = 280.14 × 141.20
  4. Step 4: Simplify right side
    186.76x = 39,553.66
  5. Step 5: Solve for x
    x = 39,553.66/186.76
  6. Step 6: Final answer
    x = 211.79

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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.