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Finding the Fourth Proportional to 323.98, 485.89 and 92.87

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Solution

The fourth proportional to 323.98, 485.89 and 92.87 is: 139.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.98 : 485.89 = 92.87 : x
  2. Step 2: Convert to fraction form
    323.98/485.89 = 92.87/x
  3. Step 3: Cross multiply
    323.98x = 485.89 × 92.87
  4. Step 4: Simplify right side
    323.98x = 45,124.37
  5. Step 5: Solve for x
    x = 45,124.37/323.98
  6. Step 6: Final answer
    x = 139.28

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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.