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Finding the Fourth Proportional to 225.56, 311.51 and 159.95

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Solution

The fourth proportional to 225.56, 311.51 and 159.95 is: 220.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.56 : 311.51 = 159.95 : x
  2. Step 2: Convert to fraction form
    225.56/311.51 = 159.95/x
  3. Step 3: Cross multiply
    225.56x = 311.51 × 159.95
  4. Step 4: Simplify right side
    225.56x = 49,826.02
  5. Step 5: Solve for x
    x = 49,826.02/225.56
  6. Step 6: Final answer
    x = 220.90

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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.