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Finding the Fourth Proportional to 203.30, 280.44 and 154.09

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Solution

The fourth proportional to 203.30, 280.44 and 154.09 is: 212.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.30 : 280.44 = 154.09 : x
  2. Step 2: Convert to fraction form
    203.30/280.44 = 154.09/x
  3. Step 3: Cross multiply
    203.30x = 280.44 × 154.09
  4. Step 4: Simplify right side
    203.30x = 43,211.60
  5. Step 5: Solve for x
    x = 43,211.60/203.30
  6. Step 6: Final answer
    x = 212.56

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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.