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Finding the Fourth Proportional to 641.80, 963.36 and 616.96

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Solution

The fourth proportional to 641.80, 963.36 and 616.96 is: 926.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.80 : 963.36 = 616.96 : x
  2. Step 2: Convert to fraction form
    641.80/963.36 = 616.96/x
  3. Step 3: Cross multiply
    641.80x = 963.36 × 616.96
  4. Step 4: Simplify right side
    641.80x = 594,354.59
  5. Step 5: Solve for x
    x = 594,354.59/641.80
  6. Step 6: Final answer
    x = 926.07

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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.