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Finding the Fourth Proportional to 225.52, 311.14 and 155.55

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Solution

The fourth proportional to 225.52, 311.14 and 155.55 is: 214.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.52 : 311.14 = 155.55 : x
  2. Step 2: Convert to fraction form
    225.52/311.14 = 155.55/x
  3. Step 3: Cross multiply
    225.52x = 311.14 × 155.55
  4. Step 4: Simplify right side
    225.52x = 48,399.19
  5. Step 5: Solve for x
    x = 48,399.19/225.52
  6. Step 6: Final answer
    x = 214.61

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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.