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Finding the Third Proportional to 391 and 606

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Solution

The third proportional to 391 and 606 is: 939.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391 : 606 = 606 : x
  2. Step 2: Convert to fraction form
    391/606 = 606/x
  3. Step 3: Cross multiply
    391x = 606 × 606
  4. Step 4: Simplify right side
    391x = 367,236
  5. Step 5: Solve for x
    x = 367,236/391
  6. Step 6: Final answer
    x = 939.22

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.