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Finding the Fourth Proportional to 394.85, 591.98 and 199.75

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Solution

The fourth proportional to 394.85, 591.98 and 199.75 is: 299.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.85 : 591.98 = 199.75 : x
  2. Step 2: Convert to fraction form
    394.85/591.98 = 199.75/x
  3. Step 3: Cross multiply
    394.85x = 591.98 × 199.75
  4. Step 4: Simplify right side
    394.85x = 118,244.05
  5. Step 5: Solve for x
    x = 118,244.05/394.85
  6. Step 6: Final answer
    x = 299.47

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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.