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Finding the Third Proportional to 628.13 and 1,356.38

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Solution

The third proportional to 628.13 and 1,356.38 is: 2,928.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.13 : 1,356.38 = 1,356.38 : x
  2. Step 2: Convert to fraction form
    628.13/1,356.38 = 1,356.38/x
  3. Step 3: Cross multiply
    628.13x = 1,356.38 × 1,356.38
  4. Step 4: Simplify right side
    628.13x = 1,839,753.14
  5. Step 5: Solve for x
    x = 1,839,753.14/628.13
  6. Step 6: Final answer
    x = 2,928.96

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.