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Finding the Fourth Proportional to 41.36, 57.05 and 28.42

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Solution

The fourth proportional to 41.36, 57.05 and 28.42 is: 39.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.36 : 57.05 = 28.42 : x
  2. Step 2: Convert to fraction form
    41.36/57.05 = 28.42/x
  3. Step 3: Cross multiply
    41.36x = 57.05 × 28.42
  4. Step 4: Simplify right side
    41.36x = 1,621.36
  5. Step 5: Solve for x
    x = 1,621.36/41.36
  6. Step 6: Final answer
    x = 39.20

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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.