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Finding the Fourth Proportional to 348.70, 481.38 and 217.78

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Solution

The fourth proportional to 348.70, 481.38 and 217.78 is: 300.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.70 : 481.38 = 217.78 : x
  2. Step 2: Convert to fraction form
    348.70/481.38 = 217.78/x
  3. Step 3: Cross multiply
    348.70x = 481.38 × 217.78
  4. Step 4: Simplify right side
    348.70x = 104,834.94
  5. Step 5: Solve for x
    x = 104,834.94/348.70
  6. Step 6: Final answer
    x = 300.65

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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.