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Finding the Fourth Proportional to 490.48, 676.86 and 303.91

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Solution

The fourth proportional to 490.48, 676.86 and 303.91 is: 419.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.48 : 676.86 = 303.91 : x
  2. Step 2: Convert to fraction form
    490.48/676.86 = 303.91/x
  3. Step 3: Cross multiply
    490.48x = 676.86 × 303.91
  4. Step 4: Simplify right side
    490.48x = 205,704.52
  5. Step 5: Solve for x
    x = 205,704.52/490.48
  6. Step 6: Final answer
    x = 419.39

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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.