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Finding the Fourth Proportional to 629.09, 868.20 and 443.03

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Solution

The fourth proportional to 629.09, 868.20 and 443.03 is: 611.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.09 : 868.20 = 443.03 : x
  2. Step 2: Convert to fraction form
    629.09/868.20 = 443.03/x
  3. Step 3: Cross multiply
    629.09x = 868.20 × 443.03
  4. Step 4: Simplify right side
    629.09x = 384,634.31
  5. Step 5: Solve for x
    x = 384,634.31/629.09
  6. Step 6: Final answer
    x = 611.42

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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.