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Finding the Fourth Proportional to 490.39, 735.57 and 125.19

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Solution

The fourth proportional to 490.39, 735.57 and 125.19 is: 187.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.39 : 735.57 = 125.19 : x
  2. Step 2: Convert to fraction form
    490.39/735.57 = 125.19/x
  3. Step 3: Cross multiply
    490.39x = 735.57 × 125.19
  4. Step 4: Simplify right side
    490.39x = 92,086.01
  5. Step 5: Solve for x
    x = 92,086.01/490.39
  6. Step 6: Final answer
    x = 187.78

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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.