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Finding the Fourth Proportional to 203.19, 304.44 and 129.89

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Solution

The fourth proportional to 203.19, 304.44 and 129.89 is: 194.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.19 : 304.44 = 129.89 : x
  2. Step 2: Convert to fraction form
    203.19/304.44 = 129.89/x
  3. Step 3: Cross multiply
    203.19x = 304.44 × 129.89
  4. Step 4: Simplify right side
    203.19x = 39,542.19
  5. Step 5: Solve for x
    x = 39,542.19/203.19
  6. Step 6: Final answer
    x = 194.61

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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.