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Finding the Fourth Proportional to 490.50, 676.17 and 342.90

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Solution

The fourth proportional to 490.50, 676.17 and 342.90 is: 472.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.50 : 676.17 = 342.90 : x
  2. Step 2: Convert to fraction form
    490.50/676.17 = 342.90/x
  3. Step 3: Cross multiply
    490.50x = 676.17 × 342.90
  4. Step 4: Simplify right side
    490.50x = 231,858.69
  5. Step 5: Solve for x
    x = 231,858.69/490.50
  6. Step 6: Final answer
    x = 472.70

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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.