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Finding the Fourth Proportional to 456.81, 685.26 and 168.25

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Solution

The fourth proportional to 456.81, 685.26 and 168.25 is: 252.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.81 : 685.26 = 168.25 : x
  2. Step 2: Convert to fraction form
    456.81/685.26 = 168.25/x
  3. Step 3: Cross multiply
    456.81x = 685.26 × 168.25
  4. Step 4: Simplify right side
    456.81x = 115,295.00
  5. Step 5: Solve for x
    x = 115,295.00/456.81
  6. Step 6: Final answer
    x = 252.39

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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.