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Finding the Third Proportional to 399.56 and 960.75

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Solution

The third proportional to 399.56 and 960.75 is: 2,310.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.56 : 960.75 = 960.75 : x
  2. Step 2: Convert to fraction form
    399.56/960.75 = 960.75/x
  3. Step 3: Cross multiply
    399.56x = 960.75 × 960.75
  4. Step 4: Simplify right side
    399.56x = 923,040.56
  5. Step 5: Solve for x
    x = 923,040.56/399.56
  6. Step 6: Final answer
    x = 2,310.13

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Why These Related Problems?

These problems maintain the same ratio (2.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.