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Finding the Fourth Proportional to 323.47, 485.22 and 107.20

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Solution

The fourth proportional to 323.47, 485.22 and 107.20 is: 160.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.47 : 485.22 = 107.20 : x
  2. Step 2: Convert to fraction form
    323.47/485.22 = 107.20/x
  3. Step 3: Cross multiply
    323.47x = 485.22 × 107.20
  4. Step 4: Simplify right side
    323.47x = 52,013.16
  5. Step 5: Solve for x
    x = 52,013.16/323.47
  6. Step 6: Final answer
    x = 160.80

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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.