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Finding the Third Proportional to 664.88 and 958.78

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Solution

The third proportional to 664.88 and 958.78 is: 1,382.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.88 : 958.78 = 958.78 : x
  2. Step 2: Convert to fraction form
    664.88/958.78 = 958.78/x
  3. Step 3: Cross multiply
    664.88x = 958.78 × 958.78
  4. Step 4: Simplify right side
    664.88x = 919,261.49
  5. Step 5: Solve for x
    x = 919,261.49/664.88
  6. Step 6: Final answer
    x = 1,382.61

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.