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Finding the Fourth Proportional to 490.18, 735.45 and 259.08

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Solution

The fourth proportional to 490.18, 735.45 and 259.08 is: 388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.18 : 735.45 = 259.08 : x
  2. Step 2: Convert to fraction form
    490.18/735.45 = 259.08/x
  3. Step 3: Cross multiply
    490.18x = 735.45 × 259.08
  4. Step 4: Simplify right side
    490.18x = 190,540.39
  5. Step 5: Solve for x
    x = 190,540.39/490.18
  6. Step 6: Final answer
    x = 388.72

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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.