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Finding the Fourth Proportional to 394.65, 544.61 and 217.61

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Solution

The fourth proportional to 394.65, 544.61 and 217.61 is: 300.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.65 : 544.61 = 217.61 : x
  2. Step 2: Convert to fraction form
    394.65/544.61 = 217.61/x
  3. Step 3: Cross multiply
    394.65x = 544.61 × 217.61
  4. Step 4: Simplify right side
    394.65x = 118,512.58
  5. Step 5: Solve for x
    x = 118,512.58/394.65
  6. Step 6: Final answer
    x = 300.30

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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.