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Finding the Fourth Proportional to 203.52, 305.31 and 107.28

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Solution

The fourth proportional to 203.52, 305.31 and 107.28 is: 160.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.52 : 305.31 = 107.28 : x
  2. Step 2: Convert to fraction form
    203.52/305.31 = 107.28/x
  3. Step 3: Cross multiply
    203.52x = 305.31 × 107.28
  4. Step 4: Simplify right side
    203.52x = 32,753.66
  5. Step 5: Solve for x
    x = 32,753.66/203.52
  6. Step 6: Final answer
    x = 160.94

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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.