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Finding the Fourth Proportional to 490.25, 735.62 and 216.31

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Solution

The fourth proportional to 490.25, 735.62 and 216.31 is: 324.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.25 : 735.62 = 216.31 : x
  2. Step 2: Convert to fraction form
    490.25/735.62 = 216.31/x
  3. Step 3: Cross multiply
    490.25x = 735.62 × 216.31
  4. Step 4: Simplify right side
    490.25x = 159,121.96
  5. Step 5: Solve for x
    x = 159,121.96/490.25
  6. Step 6: Final answer
    x = 324.57

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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.