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Finding the Fourth Proportional to 323.54, 485.25 and 140.91

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Solution

The fourth proportional to 323.54, 485.25 and 140.91 is: 211.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.54 : 485.25 = 140.91 : x
  2. Step 2: Convert to fraction form
    323.54/485.25 = 140.91/x
  3. Step 3: Cross multiply
    323.54x = 485.25 × 140.91
  4. Step 4: Simplify right side
    323.54x = 68,376.58
  5. Step 5: Solve for x
    x = 68,376.58/323.54
  6. Step 6: Final answer
    x = 211.34

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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.