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Finding the Third Proportional to 639.46 and 1,451.04

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Solution

The third proportional to 639.46 and 1,451.04 is: 3,292.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.46 : 1,451.04 = 1,451.04 : x
  2. Step 2: Convert to fraction form
    639.46/1,451.04 = 1,451.04/x
  3. Step 3: Cross multiply
    639.46x = 1,451.04 × 1,451.04
  4. Step 4: Simplify right side
    639.46x = 2,105,514.36
  5. Step 5: Solve for x
    x = 2,105,514.36/639.46
  6. Step 6: Final answer
    x = 3,292.66

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Why These Related Problems?

These problems maintain the same ratio (2.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.