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Finding the Third Proportional to 644.06 and 999.38

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Solution

The third proportional to 644.06 and 999.38 is: 1,550.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.06 : 999.38 = 999.38 : x
  2. Step 2: Convert to fraction form
    644.06/999.38 = 999.38/x
  3. Step 3: Cross multiply
    644.06x = 999.38 × 999.38
  4. Step 4: Simplify right side
    644.06x = 998,750.39
  5. Step 5: Solve for x
    x = 998,750.39/644.06
  6. Step 6: Final answer
    x = 1,550.70

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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.