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Finding the Fourth Proportional to 490.90, 736.48 and 198.48

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Solution

The fourth proportional to 490.90, 736.48 and 198.48 is: 297.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.90 : 736.48 = 198.48 : x
  2. Step 2: Convert to fraction form
    490.90/736.48 = 198.48/x
  3. Step 3: Cross multiply
    490.90x = 736.48 × 198.48
  4. Step 4: Simplify right side
    490.90x = 146,176.55
  5. Step 5: Solve for x
    x = 146,176.55/490.90
  6. Step 6: Final answer
    x = 297.77

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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.