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Finding the Third Proportional to 628.38 and 999.25

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Solution

The third proportional to 628.38 and 999.25 is: 1,589.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.38 : 999.25 = 999.25 : x
  2. Step 2: Convert to fraction form
    628.38/999.25 = 999.25/x
  3. Step 3: Cross multiply
    628.38x = 999.25 × 999.25
  4. Step 4: Simplify right side
    628.38x = 998,500.56
  5. Step 5: Solve for x
    x = 998,500.56/628.38
  6. Step 6: Final answer
    x = 1,589.02

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.