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Finding the Fourth Proportional to 490.04, 676.80 and 380.83

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Solution

The fourth proportional to 490.04, 676.80 and 380.83 is: 525.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.04 : 676.80 = 380.83 : x
  2. Step 2: Convert to fraction form
    490.04/676.80 = 380.83/x
  3. Step 3: Cross multiply
    490.04x = 676.80 × 380.83
  4. Step 4: Simplify right side
    490.04x = 257,745.74
  5. Step 5: Solve for x
    x = 257,745.74/490.04
  6. Step 6: Final answer
    x = 525.97

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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.