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Finding the Fourth Proportional to 963.20, 1,443.20 and 825.60

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Solution

The fourth proportional to 963.20, 1,443.20 and 825.60 is: 1,237.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.20 : 1,443.20 = 825.60 : x
  2. Step 2: Convert to fraction form
    963.20/1,443.20 = 825.60/x
  3. Step 3: Cross multiply
    963.20x = 1,443.20 × 825.60
  4. Step 4: Simplify right side
    963.20x = 1,191,505.92
  5. Step 5: Solve for x
    x = 1,191,505.92/963.20
  6. Step 6: Final answer
    x = 1,237.03

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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.