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Finding the Third Proportional to 212.91 and 454.69

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Solution

The third proportional to 212.91 and 454.69 is: 971.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.91 : 454.69 = 454.69 : x
  2. Step 2: Convert to fraction form
    212.91/454.69 = 454.69/x
  3. Step 3: Cross multiply
    212.91x = 454.69 × 454.69
  4. Step 4: Simplify right side
    212.91x = 206,740.72
  5. Step 5: Solve for x
    x = 206,740.72/212.91
  6. Step 6: Final answer
    x = 971.04

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.