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Finding the Fourth Proportional to 960.89, 1,441.39 and 311.68

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Solution

The fourth proportional to 960.89, 1,441.39 and 311.68 is: 467.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.89 : 1,441.39 = 311.68 : x
  2. Step 2: Convert to fraction form
    960.89/1,441.39 = 311.68/x
  3. Step 3: Cross multiply
    960.89x = 1,441.39 × 311.68
  4. Step 4: Simplify right side
    960.89x = 449,252.44
  5. Step 5: Solve for x
    x = 449,252.44/960.89
  6. Step 6: Final answer
    x = 467.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.