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Finding the Third Proportional to 409.88 and 627.66

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Solution

The third proportional to 409.88 and 627.66 is: 961.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.88 : 627.66 = 627.66 : x
  2. Step 2: Convert to fraction form
    409.88/627.66 = 627.66/x
  3. Step 3: Cross multiply
    409.88x = 627.66 × 627.66
  4. Step 4: Simplify right side
    409.88x = 393,952.37
  5. Step 5: Solve for x
    x = 393,952.37/409.88
  6. Step 6: Final answer
    x = 961.15

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.