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Finding the Fourth Proportional to 224.54, 309.87 and 137.18

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Solution

The fourth proportional to 224.54, 309.87 and 137.18 is: 189.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.54 : 309.87 = 137.18 : x
  2. Step 2: Convert to fraction form
    224.54/309.87 = 137.18/x
  3. Step 3: Cross multiply
    224.54x = 309.87 × 137.18
  4. Step 4: Simplify right side
    224.54x = 42,507.97
  5. Step 5: Solve for x
    x = 42,507.97/224.54
  6. Step 6: Final answer
    x = 189.31

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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.