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Finding the Fourth Proportional to 65.26, 97.91 and 19.61

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Solution

The fourth proportional to 65.26, 97.91 and 19.61 is: 29.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.26 : 97.91 = 19.61 : x
  2. Step 2: Convert to fraction form
    65.26/97.91 = 19.61/x
  3. Step 3: Cross multiply
    65.26x = 97.91 × 19.61
  4. Step 4: Simplify right side
    65.26x = 1,920.42
  5. Step 5: Solve for x
    x = 1,920.42/65.26
  6. Step 6: Final answer
    x = 29.43

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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.