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Finding the Fourth Proportional to 394.29, 544.09 and 217.25

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Solution

The fourth proportional to 394.29, 544.09 and 217.25 is: 299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.29 : 544.09 = 217.25 : x
  2. Step 2: Convert to fraction form
    394.29/544.09 = 217.25/x
  3. Step 3: Cross multiply
    394.29x = 544.09 × 217.25
  4. Step 4: Simplify right side
    394.29x = 118,200.29
  5. Step 5: Solve for x
    x = 118,200.29/394.29
  6. Step 6: Final answer
    x = 299.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.