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Finding the Fourth Proportional to 223.11, 308.13 and 149.75

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Solution

The fourth proportional to 223.11, 308.13 and 149.75 is: 206.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.11 : 308.13 = 149.75 : x
  2. Step 2: Convert to fraction form
    223.11/308.13 = 149.75/x
  3. Step 3: Cross multiply
    223.11x = 308.13 × 149.75
  4. Step 4: Simplify right side
    223.11x = 46,142.47
  5. Step 5: Solve for x
    x = 46,142.47/223.11
  6. Step 6: Final answer
    x = 206.81

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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.