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Finding the Fourth Proportional to 381.44, 572.34 and 219.26

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Solution

The fourth proportional to 381.44, 572.34 and 219.26 is: 328.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.44 : 572.34 = 219.26 : x
  2. Step 2: Convert to fraction form
    381.44/572.34 = 219.26/x
  3. Step 3: Cross multiply
    381.44x = 572.34 × 219.26
  4. Step 4: Simplify right side
    381.44x = 125,491.27
  5. Step 5: Solve for x
    x = 125,491.27/381.44
  6. Step 6: Final answer
    x = 328.99

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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.