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Finding the Fourth Proportional to 226.13, 312.05 and 122.63

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Solution

The fourth proportional to 226.13, 312.05 and 122.63 is: 169.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.13 : 312.05 = 122.63 : x
  2. Step 2: Convert to fraction form
    226.13/312.05 = 122.63/x
  3. Step 3: Cross multiply
    226.13x = 312.05 × 122.63
  4. Step 4: Simplify right side
    226.13x = 38,265.44
  5. Step 5: Solve for x
    x = 38,265.44/226.13
  6. Step 6: Final answer
    x = 169.22

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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.