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Finding the Fourth Proportional to 327.88, 491.28 and 219.34

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Solution

The fourth proportional to 327.88, 491.28 and 219.34 is: 328.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.88 : 491.28 = 219.34 : x
  2. Step 2: Convert to fraction form
    327.88/491.28 = 219.34/x
  3. Step 3: Cross multiply
    327.88x = 491.28 × 219.34
  4. Step 4: Simplify right side
    327.88x = 107,757.36
  5. Step 5: Solve for x
    x = 107,757.36/327.88
  6. Step 6: Final answer
    x = 328.65

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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.