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Finding the Fourth Proportional to 490.88, 736.32 and 408.32

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Solution

The fourth proportional to 490.88, 736.32 and 408.32 is: 612.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.88 : 736.32 = 408.32 : x
  2. Step 2: Convert to fraction form
    490.88/736.32 = 408.32/x
  3. Step 3: Cross multiply
    490.88x = 736.32 × 408.32
  4. Step 4: Simplify right side
    490.88x = 300,654.18
  5. Step 5: Solve for x
    x = 300,654.18/490.88
  6. Step 6: Final answer
    x = 612.48

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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.