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Finding the Fourth Proportional to 65.27, 89.88 and 63.85

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Solution

The fourth proportional to 65.27, 89.88 and 63.85 is: 87.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.27 : 89.88 = 63.85 : x
  2. Step 2: Convert to fraction form
    65.27/89.88 = 63.85/x
  3. Step 3: Cross multiply
    65.27x = 89.88 × 63.85
  4. Step 4: Simplify right side
    65.27x = 5,738.84
  5. Step 5: Solve for x
    x = 5,738.84/65.27
  6. Step 6: Final answer
    x = 87.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.