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Finding the Fourth Proportional to 41.50, 56.90 and 39.96

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Solution

The fourth proportional to 41.50, 56.90 and 39.96 is: 54.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.50 : 56.90 = 39.96 : x
  2. Step 2: Convert to fraction form
    41.50/56.90 = 39.96/x
  3. Step 3: Cross multiply
    41.50x = 56.90 × 39.96
  4. Step 4: Simplify right side
    41.50x = 2,273.82
  5. Step 5: Solve for x
    x = 2,273.82/41.50
  6. Step 6: Final answer
    x = 54.80

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.