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Finding the Fourth Proportional to 223.49, 308.41 and 136.15

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Solution

The fourth proportional to 223.49, 308.41 and 136.15 is: 187.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.49 : 308.41 = 136.15 : x
  2. Step 2: Convert to fraction form
    223.49/308.41 = 136.15/x
  3. Step 3: Cross multiply
    223.49x = 308.41 × 136.15
  4. Step 4: Simplify right side
    223.49x = 41,988.91
  5. Step 5: Solve for x
    x = 41,988.91/223.49
  6. Step 6: Final answer
    x = 187.88

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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.