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Finding the Third Proportional to 318.62 and 451.04

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Solution

The third proportional to 318.62 and 451.04 is: 638.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.62 : 451.04 = 451.04 : x
  2. Step 2: Convert to fraction form
    318.62/451.04 = 451.04/x
  3. Step 3: Cross multiply
    318.62x = 451.04 × 451.04
  4. Step 4: Simplify right side
    318.62x = 203,434.47
  5. Step 5: Solve for x
    x = 203,434.47/318.62
  6. Step 6: Final answer
    x = 638.48

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.