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Finding the Fourth Proportional to 399.41, 551.19 and 222.38

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Solution

The fourth proportional to 399.41, 551.19 and 222.38 is: 306.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.41 : 551.19 = 222.38 : x
  2. Step 2: Convert to fraction form
    399.41/551.19 = 222.38/x
  3. Step 3: Cross multiply
    399.41x = 551.19 × 222.38
  4. Step 4: Simplify right side
    399.41x = 122,573.63
  5. Step 5: Solve for x
    x = 122,573.63/399.41
  6. Step 6: Final answer
    x = 306.89

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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.