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Finding the Fourth Proportional to 41.80, 57.78 and 40.60

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Solution

The fourth proportional to 41.80, 57.78 and 40.60 is: 56.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.80 : 57.78 = 40.60 : x
  2. Step 2: Convert to fraction form
    41.80/57.78 = 40.60/x
  3. Step 3: Cross multiply
    41.80x = 57.78 × 40.60
  4. Step 4: Simplify right side
    41.80x = 2,345.87
  5. Step 5: Solve for x
    x = 2,345.87/41.80
  6. Step 6: Final answer
    x = 56.12

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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.