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Finding the Fourth Proportional to 225.61, 311.39 and 159.55

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Solution

The fourth proportional to 225.61, 311.39 and 159.55 is: 220.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.61 : 311.39 = 159.55 : x
  2. Step 2: Convert to fraction form
    225.61/311.39 = 159.55/x
  3. Step 3: Cross multiply
    225.61x = 311.39 × 159.55
  4. Step 4: Simplify right side
    225.61x = 49,682.27
  5. Step 5: Solve for x
    x = 49,682.27/225.61
  6. Step 6: Final answer
    x = 220.21

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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.