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Finding the Fourth Proportional to 490.19, 735.34 and 259.09

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Solution

The fourth proportional to 490.19, 735.34 and 259.09 is: 388.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.19 : 735.34 = 259.09 : x
  2. Step 2: Convert to fraction form
    490.19/735.34 = 259.09/x
  3. Step 3: Cross multiply
    490.19x = 735.34 × 259.09
  4. Step 4: Simplify right side
    490.19x = 190,517.16
  5. Step 5: Solve for x
    x = 190,517.16/490.19
  6. Step 6: Final answer
    x = 388.66

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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.