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Finding the Fourth Proportional to 490.93, 736.20 and 166.21

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Solution

The fourth proportional to 490.93, 736.20 and 166.21 is: 249.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.93 : 736.20 = 166.21 : x
  2. Step 2: Convert to fraction form
    490.93/736.20 = 166.21/x
  3. Step 3: Cross multiply
    490.93x = 736.20 × 166.21
  4. Step 4: Simplify right side
    490.93x = 122,363.80
  5. Step 5: Solve for x
    x = 122,363.80/490.93
  6. Step 6: Final answer
    x = 249.25

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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.