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Finding the Fourth Proportional to 641.70, 963.92 and 544.40

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Solution

The fourth proportional to 641.70, 963.92 and 544.40 is: 817.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.70 : 963.92 = 544.40 : x
  2. Step 2: Convert to fraction form
    641.70/963.92 = 544.40/x
  3. Step 3: Cross multiply
    641.70x = 963.92 × 544.40
  4. Step 4: Simplify right side
    641.70x = 524,758.05
  5. Step 5: Solve for x
    x = 524,758.05/641.70
  6. Step 6: Final answer
    x = 817.76

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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.