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Finding the Fourth Proportional to 323.54, 485.20 and 186.65

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Solution

The fourth proportional to 323.54, 485.20 and 186.65 is: 279.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.54 : 485.20 = 186.65 : x
  2. Step 2: Convert to fraction form
    323.54/485.20 = 186.65/x
  3. Step 3: Cross multiply
    323.54x = 485.20 × 186.65
  4. Step 4: Simplify right side
    323.54x = 90,562.58
  5. Step 5: Solve for x
    x = 90,562.58/323.54
  6. Step 6: Final answer
    x = 279.91

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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.