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Finding the Fourth Proportional to 41.48, 57.31 and 30.54

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Solution

The fourth proportional to 41.48, 57.31 and 30.54 is: 42.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.48 : 57.31 = 30.54 : x
  2. Step 2: Convert to fraction form
    41.48/57.31 = 30.54/x
  3. Step 3: Cross multiply
    41.48x = 57.31 × 30.54
  4. Step 4: Simplify right side
    41.48x = 1,750.17
  5. Step 5: Solve for x
    x = 1,750.17/41.48
  6. Step 6: Final answer
    x = 42.20

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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.