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Finding the Fourth Proportional to 224.57, 309.94 and 137.25

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Solution

The fourth proportional to 224.57, 309.94 and 137.25 is: 189.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.57 : 309.94 = 137.25 : x
  2. Step 2: Convert to fraction form
    224.57/309.94 = 137.25/x
  3. Step 3: Cross multiply
    224.57x = 309.94 × 137.25
  4. Step 4: Simplify right side
    224.57x = 42,538.92
  5. Step 5: Solve for x
    x = 42,538.92/224.57
  6. Step 6: Final answer
    x = 189.42

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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.