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Finding the Fourth Proportional to 187.44, 280.92 and 139.12

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Solution

The fourth proportional to 187.44, 280.92 and 139.12 is: 208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.44 : 280.92 = 139.12 : x
  2. Step 2: Convert to fraction form
    187.44/280.92 = 139.12/x
  3. Step 3: Cross multiply
    187.44x = 280.92 × 139.12
  4. Step 4: Simplify right side
    187.44x = 39,081.59
  5. Step 5: Solve for x
    x = 39,081.59/187.44
  6. Step 6: Final answer
    x = 208.50

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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.