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Finding the Fourth Proportional to 411.68, 617.50 and 168.38

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Solution

The fourth proportional to 411.68, 617.50 and 168.38 is: 252.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.68 : 617.50 = 168.38 : x
  2. Step 2: Convert to fraction form
    411.68/617.50 = 168.38/x
  3. Step 3: Cross multiply
    411.68x = 617.50 × 168.38
  4. Step 4: Simplify right side
    411.68x = 103,974.65
  5. Step 5: Solve for x
    x = 103,974.65/411.68
  6. Step 6: Final answer
    x = 252.56

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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.