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Finding the Fourth Proportional to 394.88, 591.90 and 189.44

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Solution

The fourth proportional to 394.88, 591.90 and 189.44 is: 283.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.88 : 591.90 = 189.44 : x
  2. Step 2: Convert to fraction form
    394.88/591.90 = 189.44/x
  3. Step 3: Cross multiply
    394.88x = 591.90 × 189.44
  4. Step 4: Simplify right side
    394.88x = 112,129.54
  5. Step 5: Solve for x
    x = 112,129.54/394.88
  6. Step 6: Final answer
    x = 283.96

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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.