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Finding the Fourth Proportional to 323.31, 485.10 and 186.15

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Solution

The fourth proportional to 323.31, 485.10 and 186.15 is: 279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.31 : 485.10 = 186.15 : x
  2. Step 2: Convert to fraction form
    323.31/485.10 = 186.15/x
  3. Step 3: Cross multiply
    323.31x = 485.10 × 186.15
  4. Step 4: Simplify right side
    323.31x = 90,301.37
  5. Step 5: Solve for x
    x = 90,301.37/323.31
  6. Step 6: Final answer
    x = 279.30

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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.