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Finding the Fourth Proportional to 3,604.25, 5,406.38 and 868.25

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Solution

The fourth proportional to 3,604.25, 5,406.38 and 868.25 is: 1,302.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,604.25 : 5,406.38 = 868.25 : x
  2. Step 2: Convert to fraction form
    3,604.25/5,406.38 = 868.25/x
  3. Step 3: Cross multiply
    3,604.25x = 5,406.38 × 868.25
  4. Step 4: Simplify right side
    3,604.25x = 4,694,089.44
  5. Step 5: Solve for x
    x = 4,694,089.44/3,604.25
  6. Step 6: Final answer
    x = 1,302.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.