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Finding the Fourth Proportional to 490.70, 676.94 and 335.18

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Solution

The fourth proportional to 490.70, 676.94 and 335.18 is: 462.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.70 : 676.94 = 335.18 : x
  2. Step 2: Convert to fraction form
    490.70/676.94 = 335.18/x
  3. Step 3: Cross multiply
    490.70x = 676.94 × 335.18
  4. Step 4: Simplify right side
    490.70x = 226,896.75
  5. Step 5: Solve for x
    x = 226,896.75/490.70
  6. Step 6: Final answer
    x = 462.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.