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Finding the Fourth Proportional to 382.20, 572.22 and 219.64

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Solution

The fourth proportional to 382.20, 572.22 and 219.64 is: 328.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.20 : 572.22 = 219.64 : x
  2. Step 2: Convert to fraction form
    382.20/572.22 = 219.64/x
  3. Step 3: Cross multiply
    382.20x = 572.22 × 219.64
  4. Step 4: Simplify right side
    382.20x = 125,682.40
  5. Step 5: Solve for x
    x = 125,682.40/382.20
  6. Step 6: Final answer
    x = 328.84

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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.