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Finding the Fourth Proportional to 224.38, 309.40 and 154.54

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Solution

The fourth proportional to 224.38, 309.40 and 154.54 is: 213.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.38 : 309.40 = 154.54 : x
  2. Step 2: Convert to fraction form
    224.38/309.40 = 154.54/x
  3. Step 3: Cross multiply
    224.38x = 309.40 × 154.54
  4. Step 4: Simplify right side
    224.38x = 47,813.52
  5. Step 5: Solve for x
    x = 47,813.52/224.38
  6. Step 6: Final answer
    x = 213.09

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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.