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Finding the Fourth Proportional to 638.41, 881.87 and 500.28

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Solution

The fourth proportional to 638.41, 881.87 and 500.28 is: 691.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.41 : 881.87 = 500.28 : x
  2. Step 2: Convert to fraction form
    638.41/881.87 = 500.28/x
  3. Step 3: Cross multiply
    638.41x = 881.87 × 500.28
  4. Step 4: Simplify right side
    638.41x = 441,181.92
  5. Step 5: Solve for x
    x = 441,181.92/638.41
  6. Step 6: Final answer
    x = 691.06

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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.