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Finding the Third Proportional to 97.31 and 212.64

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Solution

The third proportional to 97.31 and 212.64 is: 464.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.31 : 212.64 = 212.64 : x
  2. Step 2: Convert to fraction form
    97.31/212.64 = 212.64/x
  3. Step 3: Cross multiply
    97.31x = 212.64 × 212.64
  4. Step 4: Simplify right side
    97.31x = 45,215.70
  5. Step 5: Solve for x
    x = 45,215.70/97.31
  6. Step 6: Final answer
    x = 464.66

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.