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Finding the Third Proportional to 960 and 1,311.75

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Solution

The third proportional to 960 and 1,311.75 is: 1,792.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    960 : 1,311.75 = 1,311.75 : x
  2. Step 2: Convert to fraction form
    960/1,311.75 = 1,311.75/x
  3. Step 3: Cross multiply
    960x = 1,311.75 × 1,311.75
  4. Step 4: Simplify right side
    960x = 1,720,688.06
  5. Step 5: Solve for x
    x = 1,720,688.06/960
  6. Step 6: Final answer
    x = 1,792.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.