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Finding the Fourth Proportional to 29.92, 41.20 and 29.56

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Solution

The fourth proportional to 29.92, 41.20 and 29.56 is: 40.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.92 : 41.20 = 29.56 : x
  2. Step 2: Convert to fraction form
    29.92/41.20 = 29.56/x
  3. Step 3: Cross multiply
    29.92x = 41.20 × 29.56
  4. Step 4: Simplify right side
    29.92x = 1,217.87
  5. Step 5: Solve for x
    x = 1,217.87/29.92
  6. Step 6: Final answer
    x = 40.70

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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.