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Finding the Third Proportional to 363 and 691

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Solution

The third proportional to 363 and 691 is: 1,315.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    363 : 691 = 691 : x
  2. Step 2: Convert to fraction form
    363/691 = 691/x
  3. Step 3: Cross multiply
    363x = 691 × 691
  4. Step 4: Simplify right side
    363x = 477,481
  5. Step 5: Solve for x
    x = 477,481/363
  6. Step 6: Final answer
    x = 1,315.37

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These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.