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Finding the Fourth Proportional to 41.39, 57.08 and 30.30

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Solution

The fourth proportional to 41.39, 57.08 and 30.30 is: 41.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.39 : 57.08 = 30.30 : x
  2. Step 2: Convert to fraction form
    41.39/57.08 = 30.30/x
  3. Step 3: Cross multiply
    41.39x = 57.08 × 30.30
  4. Step 4: Simplify right side
    41.39x = 1,729.39
  5. Step 5: Solve for x
    x = 1,729.39/41.39
  6. Step 6: Final answer
    x = 41.78

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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.