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Finding the Fourth Proportional to 29, 43.18 and 27.85

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Solution

The fourth proportional to 29, 43.18 and 27.85 is: 41.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    29 : 43.18 = 27.85 : x
  2. Step 2: Convert to fraction form
    29/43.18 = 27.85/x
  3. Step 3: Cross multiply
    29x = 43.18 × 27.85
  4. Step 4: Simplify right side
    29x = 1,202.56
  5. Step 5: Solve for x
    x = 1,202.56/29
  6. Step 6: Final answer
    x = 41.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.