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Finding the Fourth Proportional to 262.87, 394.32 and 89.49

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Solution

The fourth proportional to 262.87, 394.32 and 89.49 is: 134.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.87 : 394.32 = 89.49 : x
  2. Step 2: Convert to fraction form
    262.87/394.32 = 89.49/x
  3. Step 3: Cross multiply
    262.87x = 394.32 × 89.49
  4. Step 4: Simplify right side
    262.87x = 35,286.79
  5. Step 5: Solve for x
    x = 35,286.79/262.87
  6. Step 6: Final answer
    x = 134.24

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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.