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Finding the Fourth Proportional to 226.23, 312.20 and 138.95

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Solution

The fourth proportional to 226.23, 312.20 and 138.95 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.23 : 312.20 = 138.95 : x
  2. Step 2: Convert to fraction form
    226.23/312.20 = 138.95/x
  3. Step 3: Cross multiply
    226.23x = 312.20 × 138.95
  4. Step 4: Simplify right side
    226.23x = 43,377.93
  5. Step 5: Solve for x
    x = 43,377.93/226.23
  6. Step 6: Final answer
    x = 191.74

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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.