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Finding the Fourth Proportional to 187.34, 280.28 and 126.18

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Solution

The fourth proportional to 187.34, 280.28 and 126.18 is: 188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.34 : 280.28 = 126.18 : x
  2. Step 2: Convert to fraction form
    187.34/280.28 = 126.18/x
  3. Step 3: Cross multiply
    187.34x = 280.28 × 126.18
  4. Step 4: Simplify right side
    187.34x = 35,365.73
  5. Step 5: Solve for x
    x = 35,365.73/187.34
  6. Step 6: Final answer
    x = 188.78

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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.