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Finding the Fourth Proportional to 203.31, 304.83 and 105.85

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Solution

The fourth proportional to 203.31, 304.83 and 105.85 is: 158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.31 : 304.83 = 105.85 : x
  2. Step 2: Convert to fraction form
    203.31/304.83 = 105.85/x
  3. Step 3: Cross multiply
    203.31x = 304.83 × 105.85
  4. Step 4: Simplify right side
    203.31x = 32,266.26
  5. Step 5: Solve for x
    x = 32,266.26/203.31
  6. Step 6: Final answer
    x = 158.70

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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.