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Finding the Fourth Proportional to 187, 280.28 and 84.24

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Solution

The fourth proportional to 187, 280.28 and 84.24 is: 126.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    187 : 280.28 = 84.24 : x
  2. Step 2: Convert to fraction form
    187/280.28 = 84.24/x
  3. Step 3: Cross multiply
    187x = 280.28 × 84.24
  4. Step 4: Simplify right side
    187x = 23,610.79
  5. Step 5: Solve for x
    x = 23,610.79/187
  6. Step 6: Final answer
    x = 126.26

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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.