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Finding the Fourth Proportional to 963.18, 1,443.78 and 731.43

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Solution

The fourth proportional to 963.18, 1,443.78 and 731.43 is: 1,096.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.18 : 1,443.78 = 731.43 : x
  2. Step 2: Convert to fraction form
    963.18/1,443.78 = 731.43/x
  3. Step 3: Cross multiply
    963.18x = 1,443.78 × 731.43
  4. Step 4: Simplify right side
    963.18x = 1,056,024.01
  5. Step 5: Solve for x
    x = 1,056,024.01/963.18
  6. Step 6: Final answer
    x = 1,096.39

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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.