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Finding the Fourth Proportional to 323.51, 485.24 and 169.20

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Solution

The fourth proportional to 323.51, 485.24 and 169.20 is: 253.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.51 : 485.24 = 169.20 : x
  2. Step 2: Convert to fraction form
    323.51/485.24 = 169.20/x
  3. Step 3: Cross multiply
    323.51x = 485.24 × 169.20
  4. Step 4: Simplify right side
    323.51x = 82,101.76
  5. Step 5: Solve for x
    x = 82,101.76/323.51
  6. Step 6: Final answer
    x = 253.79

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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.