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Finding the Fourth Proportional to 29.75, 41.22 and 29.21

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Solution

The fourth proportional to 29.75, 41.22 and 29.21 is: 40.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.75 : 41.22 = 29.21 : x
  2. Step 2: Convert to fraction form
    29.75/41.22 = 29.21/x
  3. Step 3: Cross multiply
    29.75x = 41.22 × 29.21
  4. Step 4: Simplify right side
    29.75x = 1,203.83
  5. Step 5: Solve for x
    x = 1,203.83/29.75
  6. Step 6: Final answer
    x = 40.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.