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Finding the Fourth Proportional to 262.91, 394.35 and 89.65

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Solution

The fourth proportional to 262.91, 394.35 and 89.65 is: 134.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.91 : 394.35 = 89.65 : x
  2. Step 2: Convert to fraction form
    262.91/394.35 = 89.65/x
  3. Step 3: Cross multiply
    262.91x = 394.35 × 89.65
  4. Step 4: Simplify right side
    262.91x = 35,351.92
  5. Step 5: Solve for x
    x = 35,351.92/262.91
  6. Step 6: Final answer
    x = 134.46

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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.