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Finding the Fourth Proportional to 325.71, 449.49 and 194.80

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Solution

The fourth proportional to 325.71, 449.49 and 194.80 is: 268.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.71 : 449.49 = 194.80 : x
  2. Step 2: Convert to fraction form
    325.71/449.49 = 194.80/x
  3. Step 3: Cross multiply
    325.71x = 449.49 × 194.80
  4. Step 4: Simplify right side
    325.71x = 87,560.26
  5. Step 5: Solve for x
    x = 87,560.26/325.71
  6. Step 6: Final answer
    x = 268.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.