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Finding the Fourth Proportional to 348.79, 481.19 and 199.42

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Solution

The fourth proportional to 348.79, 481.19 and 199.42 is: 275.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.79 : 481.19 = 199.42 : x
  2. Step 2: Convert to fraction form
    348.79/481.19 = 199.42/x
  3. Step 3: Cross multiply
    348.79x = 481.19 × 199.42
  4. Step 4: Simplify right side
    348.79x = 95,958.21
  5. Step 5: Solve for x
    x = 95,958.21/348.79
  6. Step 6: Final answer
    x = 275.12

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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.