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Finding the Third Proportional to 392 and 671

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Solution

The third proportional to 392 and 671 is: 1,148.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    392 : 671 = 671 : x
  2. Step 2: Convert to fraction form
    392/671 = 671/x
  3. Step 3: Cross multiply
    392x = 671 × 671
  4. Step 4: Simplify right side
    392x = 450,241
  5. Step 5: Solve for x
    x = 450,241/392
  6. Step 6: Final answer
    x = 1,148.57

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.