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Finding the Fourth Proportional to 224.20, 309.51 and 136.84

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Solution

The fourth proportional to 224.20, 309.51 and 136.84 is: 188.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.20 : 309.51 = 136.84 : x
  2. Step 2: Convert to fraction form
    224.20/309.51 = 136.84/x
  3. Step 3: Cross multiply
    224.20x = 309.51 × 136.84
  4. Step 4: Simplify right side
    224.20x = 42,353.35
  5. Step 5: Solve for x
    x = 42,353.35/224.20
  6. Step 6: Final answer
    x = 188.91

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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.