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Finding the Fourth Proportional to 41.36, 61.60 and 41.20

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Solution

The fourth proportional to 41.36, 61.60 and 41.20 is: 61.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.36 : 61.60 = 41.20 : x
  2. Step 2: Convert to fraction form
    41.36/61.60 = 41.20/x
  3. Step 3: Cross multiply
    41.36x = 61.60 × 41.20
  4. Step 4: Simplify right side
    41.36x = 2,537.92
  5. Step 5: Solve for x
    x = 2,537.92/41.36
  6. Step 6: Final answer
    x = 61.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.