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Finding the Third Proportional to 2.61 and 6.70

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Solution

The third proportional to 2.61 and 6.70 is: 17.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.61 : 6.70 = 6.70 : x
  2. Step 2: Convert to fraction form
    2.61/6.70 = 6.70/x
  3. Step 3: Cross multiply
    2.61x = 6.70 × 6.70
  4. Step 4: Simplify right side
    2.61x = 44.92
  5. Step 5: Solve for x
    x = 44.92/2.61
  6. Step 6: Final answer
    x = 17.18

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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.