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Finding the Fourth Proportional to 65.28, 97.95 and 39.66

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Solution

The fourth proportional to 65.28, 97.95 and 39.66 is: 59.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.28 : 97.95 = 39.66 : x
  2. Step 2: Convert to fraction form
    65.28/97.95 = 39.66/x
  3. Step 3: Cross multiply
    65.28x = 97.95 × 39.66
  4. Step 4: Simplify right side
    65.28x = 3,884.70
  5. Step 5: Solve for x
    x = 3,884.70/65.28
  6. Step 6: Final answer
    x = 59.51

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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.