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Finding the Third Proportional to 2.58 and 6.61

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Solution

The third proportional to 2.58 and 6.61 is: 16.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.58 : 6.61 = 6.61 : x
  2. Step 2: Convert to fraction form
    2.58/6.61 = 6.61/x
  3. Step 3: Cross multiply
    2.58x = 6.61 × 6.61
  4. Step 4: Simplify right side
    2.58x = 43.72
  5. Step 5: Solve for x
    x = 43.72/2.58
  6. Step 6: Final answer
    x = 16.95

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Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.