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Finding the Fourth Proportional to 348.12, 480.21 and 223.80

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Solution

The fourth proportional to 348.12, 480.21 and 223.80 is: 308.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.12 : 480.21 = 223.80 : x
  2. Step 2: Convert to fraction form
    348.12/480.21 = 223.80/x
  3. Step 3: Cross multiply
    348.12x = 480.21 × 223.80
  4. Step 4: Simplify right side
    348.12x = 107,468.60
  5. Step 5: Solve for x
    x = 107,468.60/348.12
  6. Step 6: Final answer
    x = 308.71

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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.