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Finding the Fourth Proportional to 641.21, 961.02 and 344.27

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Solution

The fourth proportional to 641.21, 961.02 and 344.27 is: 515.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.21 : 961.02 = 344.27 : x
  2. Step 2: Convert to fraction form
    641.21/961.02 = 344.27/x
  3. Step 3: Cross multiply
    641.21x = 961.02 × 344.27
  4. Step 4: Simplify right side
    641.21x = 330,845.55
  5. Step 5: Solve for x
    x = 330,845.55/641.21
  6. Step 6: Final answer
    x = 515.97

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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.