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Finding the Fourth Proportional to 186.78, 280.15 and 110.27

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Solution

The fourth proportional to 186.78, 280.15 and 110.27 is: 165.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.78 : 280.15 = 110.27 : x
  2. Step 2: Convert to fraction form
    186.78/280.15 = 110.27/x
  3. Step 3: Cross multiply
    186.78x = 280.15 × 110.27
  4. Step 4: Simplify right side
    186.78x = 30,892.14
  5. Step 5: Solve for x
    x = 30,892.14/186.78
  6. Step 6: Final answer
    x = 165.39

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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.