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Finding the Fourth Proportional to 187.35, 280.80 and 84.53

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Solution

The fourth proportional to 187.35, 280.80 and 84.53 is: 126.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.35 : 280.80 = 84.53 : x
  2. Step 2: Convert to fraction form
    187.35/280.80 = 84.53/x
  3. Step 3: Cross multiply
    187.35x = 280.80 × 84.53
  4. Step 4: Simplify right side
    187.35x = 23,736.02
  5. Step 5: Solve for x
    x = 23,736.02/187.35
  6. Step 6: Final answer
    x = 126.69

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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.