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Finding the Fourth Proportional to 41.36, 57 and 28.40

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Solution

The fourth proportional to 41.36, 57 and 28.40 is: 39.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.36 : 57 = 28.40 : x
  2. Step 2: Convert to fraction form
    41.36/57 = 28.40/x
  3. Step 3: Cross multiply
    41.36x = 57 × 28.40
  4. Step 4: Simplify right side
    41.36x = 1,618.80
  5. Step 5: Solve for x
    x = 1,618.80/41.36
  6. Step 6: Final answer
    x = 39.14

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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.