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Finding the Fourth Proportional to 312.39, 467.97 and 203.85

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Solution

The fourth proportional to 312.39, 467.97 and 203.85 is: 305.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.39 : 467.97 = 203.85 : x
  2. Step 2: Convert to fraction form
    312.39/467.97 = 203.85/x
  3. Step 3: Cross multiply
    312.39x = 467.97 × 203.85
  4. Step 4: Simplify right side
    312.39x = 95,392.33
  5. Step 5: Solve for x
    x = 95,392.33/312.39
  6. Step 6: Final answer
    x = 305.37

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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.