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Finding the Fourth Proportional to 323.41, 485.20 and 186.21

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Solution

The fourth proportional to 323.41, 485.20 and 186.21 is: 279.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.41 : 485.20 = 186.21 : x
  2. Step 2: Convert to fraction form
    323.41/485.20 = 186.21/x
  3. Step 3: Cross multiply
    323.41x = 485.20 × 186.21
  4. Step 4: Simplify right side
    323.41x = 90,349.09
  5. Step 5: Solve for x
    x = 90,349.09/323.41
  6. Step 6: Final answer
    x = 279.36

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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.