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Finding the Fourth Proportional to 324.11, 485.84 and 107.55

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Solution

The fourth proportional to 324.11, 485.84 and 107.55 is: 161.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    324.11 : 485.84 = 107.55 : x
  2. Step 2: Convert to fraction form
    324.11/485.84 = 107.55/x
  3. Step 3: Cross multiply
    324.11x = 485.84 × 107.55
  4. Step 4: Simplify right side
    324.11x = 52,251.55
  5. Step 5: Solve for x
    x = 52,251.55/324.11
  6. Step 6: Final answer
    x = 161.22

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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.