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Finding the Fourth Proportional to 42.12, 57.33 and 41.85

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Solution

The fourth proportional to 42.12, 57.33 and 41.85 is: 56.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.12 : 57.33 = 41.85 : x
  2. Step 2: Convert to fraction form
    42.12/57.33 = 41.85/x
  3. Step 3: Cross multiply
    42.12x = 57.33 × 41.85
  4. Step 4: Simplify right side
    42.12x = 2,399.26
  5. Step 5: Solve for x
    x = 2,399.26/42.12
  6. Step 6: Final answer
    x = 56.96

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.