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Finding the Fourth Proportional to 224.21, 309.34 and 136.91

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Solution

The fourth proportional to 224.21, 309.34 and 136.91 is: 188.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.21 : 309.34 = 136.91 : x
  2. Step 2: Convert to fraction form
    224.21/309.34 = 136.91/x
  3. Step 3: Cross multiply
    224.21x = 309.34 × 136.91
  4. Step 4: Simplify right side
    224.21x = 42,351.74
  5. Step 5: Solve for x
    x = 42,351.74/224.21
  6. Step 6: Final answer
    x = 188.89

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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.