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Finding the Fourth Proportional to 490.11, 676.37 and 303.70

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Solution

The fourth proportional to 490.11, 676.37 and 303.70 is: 419.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.11 : 676.37 = 303.70 : x
  2. Step 2: Convert to fraction form
    490.11/676.37 = 303.70/x
  3. Step 3: Cross multiply
    490.11x = 676.37 × 303.70
  4. Step 4: Simplify right side
    490.11x = 205,410.19
  5. Step 5: Solve for x
    x = 205,410.19/490.11
  6. Step 6: Final answer
    x = 419.11

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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.