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Finding the Fourth Proportional to 641.58, 963.26 and 329.45

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Solution

The fourth proportional to 641.58, 963.26 and 329.45 is: 494.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.58 : 963.26 = 329.45 : x
  2. Step 2: Convert to fraction form
    641.58/963.26 = 329.45/x
  3. Step 3: Cross multiply
    641.58x = 963.26 × 329.45
  4. Step 4: Simplify right side
    641.58x = 317,346.01
  5. Step 5: Solve for x
    x = 317,346.01/641.58
  6. Step 6: Final answer
    x = 494.63

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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.