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Finding the Fourth Proportional to 490.72, 735.42 and 398.38

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Solution

The fourth proportional to 490.72, 735.42 and 398.38 is: 597.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.72 : 735.42 = 398.38 : x
  2. Step 2: Convert to fraction form
    490.72/735.42 = 398.38/x
  3. Step 3: Cross multiply
    490.72x = 735.42 × 398.38
  4. Step 4: Simplify right side
    490.72x = 292,976.62
  5. Step 5: Solve for x
    x = 292,976.62/490.72
  6. Step 6: Final answer
    x = 597.03

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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.