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Finding the Third Proportional to 39.88 and 56.75

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Solution

The third proportional to 39.88 and 56.75 is: 80.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.88 : 56.75 = 56.75 : x
  2. Step 2: Convert to fraction form
    39.88/56.75 = 56.75/x
  3. Step 3: Cross multiply
    39.88x = 56.75 × 56.75
  4. Step 4: Simplify right side
    39.88x = 3,220.56
  5. Step 5: Solve for x
    x = 3,220.56/39.88
  6. Step 6: Final answer
    x = 80.77

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.