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Finding the Fourth Proportional to 492.90, 739.38 and 168.28

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Solution

The fourth proportional to 492.90, 739.38 and 168.28 is: 252.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.90 : 739.38 = 168.28 : x
  2. Step 2: Convert to fraction form
    492.90/739.38 = 168.28/x
  3. Step 3: Cross multiply
    492.90x = 739.38 × 168.28
  4. Step 4: Simplify right side
    492.90x = 124,422.87
  5. Step 5: Solve for x
    x = 124,422.87/492.90
  6. Step 6: Final answer
    x = 252.43

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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.