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Finding the Fourth Proportional to 384.37, 576.55 and 219.89

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Solution

The fourth proportional to 384.37, 576.55 and 219.89 is: 329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.37 : 576.55 = 219.89 : x
  2. Step 2: Convert to fraction form
    384.37/576.55 = 219.89/x
  3. Step 3: Cross multiply
    384.37x = 576.55 × 219.89
  4. Step 4: Simplify right side
    384.37x = 126,774.15
  5. Step 5: Solve for x
    x = 126,774.15/384.37
  6. Step 6: Final answer
    x = 329.83

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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.