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Finding the Fourth Proportional to 638.58, 880.83 and 376.41

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Solution

The fourth proportional to 638.58, 880.83 and 376.41 is: 519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.58 : 880.83 = 376.41 : x
  2. Step 2: Convert to fraction form
    638.58/880.83 = 376.41/x
  3. Step 3: Cross multiply
    638.58x = 880.83 × 376.41
  4. Step 4: Simplify right side
    638.58x = 331,553.22
  5. Step 5: Solve for x
    x = 331,553.22/638.58
  6. Step 6: Final answer
    x = 519.20

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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.