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Finding the Fourth Proportional to 40.88, 61.61 and 34.61

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Solution

The fourth proportional to 40.88, 61.61 and 34.61 is: 52.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.88 : 61.61 = 34.61 : x
  2. Step 2: Convert to fraction form
    40.88/61.61 = 34.61/x
  3. Step 3: Cross multiply
    40.88x = 61.61 × 34.61
  4. Step 4: Simplify right side
    40.88x = 2,131.84
  5. Step 5: Solve for x
    x = 2,131.84/40.88
  6. Step 6: Final answer
    x = 52.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.