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Finding the Third Proportional to 79.74 and 162.63

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Solution

The third proportional to 79.74 and 162.63 is: 331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.74 : 162.63 = 162.63 : x
  2. Step 2: Convert to fraction form
    79.74/162.63 = 162.63/x
  3. Step 3: Cross multiply
    79.74x = 162.63 × 162.63
  4. Step 4: Simplify right side
    79.74x = 26,449.63
  5. Step 5: Solve for x
    x = 26,449.63/79.74
  6. Step 6: Final answer
    x = 331.70

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.