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Finding the Fourth Proportional to 224.31, 309.66 and 154.38

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Solution

The fourth proportional to 224.31, 309.66 and 154.38 is: 213.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.31 : 309.66 = 154.38 : x
  2. Step 2: Convert to fraction form
    224.31/309.66 = 154.38/x
  3. Step 3: Cross multiply
    224.31x = 309.66 × 154.38
  4. Step 4: Simplify right side
    224.31x = 47,805.31
  5. Step 5: Solve for x
    x = 47,805.31/224.31
  6. Step 6: Final answer
    x = 213.12

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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.