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Finding the Fourth Proportional to 319.75, 441.26 and 203.31

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Solution

The fourth proportional to 319.75, 441.26 and 203.31 is: 280.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.75 : 441.26 = 203.31 : x
  2. Step 2: Convert to fraction form
    319.75/441.26 = 203.31/x
  3. Step 3: Cross multiply
    319.75x = 441.26 × 203.31
  4. Step 4: Simplify right side
    319.75x = 89,712.57
  5. Step 5: Solve for x
    x = 89,712.57/319.75
  6. Step 6: Final answer
    x = 280.57

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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.