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Finding the Third Proportional to 686 and 960.50

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Solution

The third proportional to 686 and 960.50 is: 1,344.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    686 : 960.50 = 960.50 : x
  2. Step 2: Convert to fraction form
    686/960.50 = 960.50/x
  3. Step 3: Cross multiply
    686x = 960.50 × 960.50
  4. Step 4: Simplify right side
    686x = 922,560.25
  5. Step 5: Solve for x
    x = 922,560.25/686
  6. Step 6: Final answer
    x = 1,344.84

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.