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Finding the Fourth Proportional to 348.20, 480.68 and 200.81

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Solution

The fourth proportional to 348.20, 480.68 and 200.81 is: 277.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.20 : 480.68 = 200.81 : x
  2. Step 2: Convert to fraction form
    348.20/480.68 = 200.81/x
  3. Step 3: Cross multiply
    348.20x = 480.68 × 200.81
  4. Step 4: Simplify right side
    348.20x = 96,521.94
  5. Step 5: Solve for x
    x = 96,521.94/348.20
  6. Step 6: Final answer
    x = 277.21

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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.