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Finding the Fourth Proportional to 958.44, 1,438.17 and 727.25

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Solution

The fourth proportional to 958.44, 1,438.17 and 727.25 is: 1,091.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.44 : 1,438.17 = 727.25 : x
  2. Step 2: Convert to fraction form
    958.44/1,438.17 = 727.25/x
  3. Step 3: Cross multiply
    958.44x = 1,438.17 × 727.25
  4. Step 4: Simplify right side
    958.44x = 1,045,912.73
  5. Step 5: Solve for x
    x = 1,045,912.73/958.44
  6. Step 6: Final answer
    x = 1,091.27

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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.