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Finding the Fourth Proportional to 248.31, 342.18 and 203.85

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Solution

The fourth proportional to 248.31, 342.18 and 203.85 is: 280.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.31 : 342.18 = 203.85 : x
  2. Step 2: Convert to fraction form
    248.31/342.18 = 203.85/x
  3. Step 3: Cross multiply
    248.31x = 342.18 × 203.85
  4. Step 4: Simplify right side
    248.31x = 69,753.39
  5. Step 5: Solve for x
    x = 69,753.39/248.31
  6. Step 6: Final answer
    x = 280.91

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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.