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Finding the Fourth Proportional to 227.20, 340.70 and 105.50

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Solution

The fourth proportional to 227.20, 340.70 and 105.50 is: 158.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.20 : 340.70 = 105.50 : x
  2. Step 2: Convert to fraction form
    227.20/340.70 = 105.50/x
  3. Step 3: Cross multiply
    227.20x = 340.70 × 105.50
  4. Step 4: Simplify right side
    227.20x = 35,943.85
  5. Step 5: Solve for x
    x = 35,943.85/227.20
  6. Step 6: Final answer
    x = 158.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.