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Finding the Fourth Proportional to 637.87, 878.94 and 488.48

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Solution

The fourth proportional to 637.87, 878.94 and 488.48 is: 673.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.87 : 878.94 = 488.48 : x
  2. Step 2: Convert to fraction form
    637.87/878.94 = 488.48/x
  3. Step 3: Cross multiply
    637.87x = 878.94 × 488.48
  4. Step 4: Simplify right side
    637.87x = 429,344.47
  5. Step 5: Solve for x
    x = 429,344.47/637.87
  6. Step 6: Final answer
    x = 673.09

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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.