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Finding the Third Proportional to 640.13 and 927.75

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Solution

The third proportional to 640.13 and 927.75 is: 1,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.13 : 927.75 = 927.75 : x
  2. Step 2: Convert to fraction form
    640.13/927.75 = 927.75/x
  3. Step 3: Cross multiply
    640.13x = 927.75 × 927.75
  4. Step 4: Simplify right side
    640.13x = 860,720.06
  5. Step 5: Solve for x
    x = 860,720.06/640.13
  6. Step 6: Final answer
    x = 1,344.61

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.