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Finding the Fourth Proportional to 961.44, 1,439.42 and 884.90

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Solution

The fourth proportional to 961.44, 1,439.42 and 884.90 is: 1,324.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.44 : 1,439.42 = 884.90 : x
  2. Step 2: Convert to fraction form
    961.44/1,439.42 = 884.90/x
  3. Step 3: Cross multiply
    961.44x = 1,439.42 × 884.90
  4. Step 4: Simplify right side
    961.44x = 1,273,731.14
  5. Step 5: Solve for x
    x = 1,273,731.14/961.44
  6. Step 6: Final answer
    x = 1,324.82

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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.