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Finding the Fourth Proportional to 226.15, 311.56 and 170.80

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Solution

The fourth proportional to 226.15, 311.56 and 170.80 is: 235.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.15 : 311.56 = 170.80 : x
  2. Step 2: Convert to fraction form
    226.15/311.56 = 170.80/x
  3. Step 3: Cross multiply
    226.15x = 311.56 × 170.80
  4. Step 4: Simplify right side
    226.15x = 53,214.45
  5. Step 5: Solve for x
    x = 53,214.45/226.15
  6. Step 6: Final answer
    x = 235.31

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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.