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Finding the Fourth Proportional to 394.44, 591.27 and 211.95

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Solution

The fourth proportional to 394.44, 591.27 and 211.95 is: 317.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.44 : 591.27 = 211.95 : x
  2. Step 2: Convert to fraction form
    394.44/591.27 = 211.95/x
  3. Step 3: Cross multiply
    394.44x = 591.27 × 211.95
  4. Step 4: Simplify right side
    394.44x = 125,319.68
  5. Step 5: Solve for x
    x = 125,319.68/394.44
  6. Step 6: Final answer
    x = 317.72

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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.