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Finding the Fourth Proportional to 638.27, 881.00 and 376.44

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Solution

The fourth proportional to 638.27, 881.00 and 376.44 is: 519.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.27 : 881.00 = 376.44 : x
  2. Step 2: Convert to fraction form
    638.27/881.00 = 376.44/x
  3. Step 3: Cross multiply
    638.27x = 881.00 × 376.44
  4. Step 4: Simplify right side
    638.27x = 331,641.76
  5. Step 5: Solve for x
    x = 331,641.76/638.27
  6. Step 6: Final answer
    x = 519.59

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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.