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Finding the Fourth Proportional to 490.80, 736.14 and 144.18

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Solution

The fourth proportional to 490.80, 736.14 and 144.18 is: 216.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.80 : 736.14 = 144.18 : x
  2. Step 2: Convert to fraction form
    490.80/736.14 = 144.18/x
  3. Step 3: Cross multiply
    490.80x = 736.14 × 144.18
  4. Step 4: Simplify right side
    490.80x = 106,136.67
  5. Step 5: Solve for x
    x = 106,136.67/490.80
  6. Step 6: Final answer
    x = 216.25

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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.