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Finding the Fourth Proportional to 394.97, 545.04 and 217.93

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Solution

The fourth proportional to 394.97, 545.04 and 217.93 is: 300.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.97 : 545.04 = 217.93 : x
  2. Step 2: Convert to fraction form
    394.97/545.04 = 217.93/x
  3. Step 3: Cross multiply
    394.97x = 545.04 × 217.93
  4. Step 4: Simplify right side
    394.97x = 118,780.57
  5. Step 5: Solve for x
    x = 118,780.57/394.97
  6. Step 6: Final answer
    x = 300.73

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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.