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Finding the Third Proportional to 7.76 and 16.68

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Solution

The third proportional to 7.76 and 16.68 is: 35.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.76 : 16.68 = 16.68 : x
  2. Step 2: Convert to fraction form
    7.76/16.68 = 16.68/x
  3. Step 3: Cross multiply
    7.76x = 16.68 × 16.68
  4. Step 4: Simplify right side
    7.76x = 278.08
  5. Step 5: Solve for x
    x = 278.08/7.76
  6. Step 6: Final answer
    x = 35.84

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.