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Finding the Fourth Proportional to 411.44, 617.39 and 219.06

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Solution

The fourth proportional to 411.44, 617.39 and 219.06 is: 328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.44 : 617.39 = 219.06 : x
  2. Step 2: Convert to fraction form
    411.44/617.39 = 219.06/x
  3. Step 3: Cross multiply
    411.44x = 617.39 × 219.06
  4. Step 4: Simplify right side
    411.44x = 135,245.45
  5. Step 5: Solve for x
    x = 135,245.45/411.44
  6. Step 6: Final answer
    x = 328.71

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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.