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Finding the Fourth Proportional to 399.54, 599.17 and 221.41

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Solution

The fourth proportional to 399.54, 599.17 and 221.41 is: 332.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.54 : 599.17 = 221.41 : x
  2. Step 2: Convert to fraction form
    399.54/599.17 = 221.41/x
  3. Step 3: Cross multiply
    399.54x = 599.17 × 221.41
  4. Step 4: Simplify right side
    399.54x = 132,662.23
  5. Step 5: Solve for x
    x = 132,662.23/399.54
  6. Step 6: Final answer
    x = 332.04

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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.