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Finding the Fourth Proportional to 416.44, 624.47 and 221.39

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Solution

The fourth proportional to 416.44, 624.47 and 221.39 is: 331.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.44 : 624.47 = 221.39 : x
  2. Step 2: Convert to fraction form
    416.44/624.47 = 221.39/x
  3. Step 3: Cross multiply
    416.44x = 624.47 × 221.39
  4. Step 4: Simplify right side
    416.44x = 138,251.97
  5. Step 5: Solve for x
    x = 138,251.97/416.44
  6. Step 6: Final answer
    x = 331.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.