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Finding the Fourth Proportional to 323.90, 485.82 and 92.79

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Solution

The fourth proportional to 323.90, 485.82 and 92.79 is: 139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.90 : 485.82 = 92.79 : x
  2. Step 2: Convert to fraction form
    323.90/485.82 = 92.79/x
  3. Step 3: Cross multiply
    323.90x = 485.82 × 92.79
  4. Step 4: Simplify right side
    323.90x = 45,079.24
  5. Step 5: Solve for x
    x = 45,079.24/323.90
  6. Step 6: Final answer
    x = 139.18

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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.