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Finding the Fourth Proportional to 323.49, 485.25 and 92.39

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Solution

The fourth proportional to 323.49, 485.25 and 92.39 is: 138.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.49 : 485.25 = 92.39 : x
  2. Step 2: Convert to fraction form
    323.49/485.25 = 92.39/x
  3. Step 3: Cross multiply
    323.49x = 485.25 × 92.39
  4. Step 4: Simplify right side
    323.49x = 44,831.79
  5. Step 5: Solve for x
    x = 44,831.79/323.49
  6. Step 6: Final answer
    x = 138.59

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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.