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Finding the Fourth Proportional to 456.88, 685.32 and 168.28

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Solution

The fourth proportional to 456.88, 685.32 and 168.28 is: 252.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.88 : 685.32 = 168.28 : x
  2. Step 2: Convert to fraction form
    456.88/685.32 = 168.28/x
  3. Step 3: Cross multiply
    456.88x = 685.32 × 168.28
  4. Step 4: Simplify right side
    456.88x = 115,325.65
  5. Step 5: Solve for x
    x = 115,325.65/456.88
  6. Step 6: Final answer
    x = 252.42

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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.