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Finding the Fourth Proportional to 348.66, 481.20 and 208.80

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Solution

The fourth proportional to 348.66, 481.20 and 208.80 is: 288.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.66 : 481.20 = 208.80 : x
  2. Step 2: Convert to fraction form
    348.66/481.20 = 208.80/x
  3. Step 3: Cross multiply
    348.66x = 481.20 × 208.80
  4. Step 4: Simplify right side
    348.66x = 100,474.56
  5. Step 5: Solve for x
    x = 100,474.56/348.66
  6. Step 6: Final answer
    x = 288.17

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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.