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Finding the Fourth Proportional to 187.25, 280.64 and 65.37

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Solution

The fourth proportional to 187.25, 280.64 and 65.37 is: 97.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.25 : 280.64 = 65.37 : x
  2. Step 2: Convert to fraction form
    187.25/280.64 = 65.37/x
  3. Step 3: Cross multiply
    187.25x = 280.64 × 65.37
  4. Step 4: Simplify right side
    187.25x = 18,344.30
  5. Step 5: Solve for x
    x = 18,344.30/187.25
  6. Step 6: Final answer
    x = 97.97

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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.