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Finding the Fourth Proportional to 41.59, 57.42 and 31.21

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Solution

The fourth proportional to 41.59, 57.42 and 31.21 is: 43.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.59 : 57.42 = 31.21 : x
  2. Step 2: Convert to fraction form
    41.59/57.42 = 31.21/x
  3. Step 3: Cross multiply
    41.59x = 57.42 × 31.21
  4. Step 4: Simplify right side
    41.59x = 1,792.08
  5. Step 5: Solve for x
    x = 1,792.08/41.59
  6. Step 6: Final answer
    x = 43.09

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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.