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Finding the Fourth Proportional to 325.75, 449.19 and 279.28

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Solution

The fourth proportional to 325.75, 449.19 and 279.28 is: 385.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.75 : 449.19 = 279.28 : x
  2. Step 2: Convert to fraction form
    325.75/449.19 = 279.28/x
  3. Step 3: Cross multiply
    325.75x = 449.19 × 279.28
  4. Step 4: Simplify right side
    325.75x = 125,449.78
  5. Step 5: Solve for x
    x = 125,449.78/325.75
  6. Step 6: Final answer
    x = 385.11

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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.