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Finding the Fourth Proportional to 323.35, 485.09 and 106.91

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Solution

The fourth proportional to 323.35, 485.09 and 106.91 is: 160.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.35 : 485.09 = 106.91 : x
  2. Step 2: Convert to fraction form
    323.35/485.09 = 106.91/x
  3. Step 3: Cross multiply
    323.35x = 485.09 × 106.91
  4. Step 4: Simplify right side
    323.35x = 51,860.97
  5. Step 5: Solve for x
    x = 51,860.97/323.35
  6. Step 6: Final answer
    x = 160.39

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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.