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Finding the Third Proportional to 19.88 and 40.88

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Solution

The third proportional to 19.88 and 40.88 is: 84.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.88 : 40.88 = 40.88 : x
  2. Step 2: Convert to fraction form
    19.88/40.88 = 40.88/x
  3. Step 3: Cross multiply
    19.88x = 40.88 × 40.88
  4. Step 4: Simplify right side
    19.88x = 1,670.77
  5. Step 5: Solve for x
    x = 1,670.77/19.88
  6. Step 6: Final answer
    x = 84.06

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.