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Finding the Fourth Proportional to 394.26, 543.94 and 219.57

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Solution

The fourth proportional to 394.26, 543.94 and 219.57 is: 302.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.26 : 543.94 = 219.57 : x
  2. Step 2: Convert to fraction form
    394.26/543.94 = 219.57/x
  3. Step 3: Cross multiply
    394.26x = 543.94 × 219.57
  4. Step 4: Simplify right side
    394.26x = 119,432.91
  5. Step 5: Solve for x
    x = 119,432.91/394.26
  6. Step 6: Final answer
    x = 302.93

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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.