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Finding the Fourth Proportional to 490.91, 736.43 and 144.20

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Solution

The fourth proportional to 490.91, 736.43 and 144.20 is: 216.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.91 : 736.43 = 144.20 : x
  2. Step 2: Convert to fraction form
    490.91/736.43 = 144.20/x
  3. Step 3: Cross multiply
    490.91x = 736.43 × 144.20
  4. Step 4: Simplify right side
    490.91x = 106,190.47
  5. Step 5: Solve for x
    x = 106,190.47/490.91
  6. Step 6: Final answer
    x = 216.31

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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.