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Finding the Fourth Proportional to 323.56, 485.30 and 169.40

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Solution

The fourth proportional to 323.56, 485.30 and 169.40 is: 254.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.56 : 485.30 = 169.40 : x
  2. Step 2: Convert to fraction form
    323.56/485.30 = 169.40/x
  3. Step 3: Cross multiply
    323.56x = 485.30 × 169.40
  4. Step 4: Simplify right side
    323.56x = 82,209.82
  5. Step 5: Solve for x
    x = 82,209.82/323.56
  6. Step 6: Final answer
    x = 254.08

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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.