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Finding the Fourth Proportional to 308.94, 464.09 and 217.82

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Solution

The fourth proportional to 308.94, 464.09 and 217.82 is: 327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.94 : 464.09 = 217.82 : x
  2. Step 2: Convert to fraction form
    308.94/464.09 = 217.82/x
  3. Step 3: Cross multiply
    308.94x = 464.09 × 217.82
  4. Step 4: Simplify right side
    308.94x = 101,084.67
  5. Step 5: Solve for x
    x = 101,084.67/308.94
  6. Step 6: Final answer
    x = 327.20

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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.