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Finding the Fourth Proportional to 5,255.38, 7,869.16 and 3,172.60

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Solution

The fourth proportional to 5,255.38, 7,869.16 and 3,172.60 is: 4,750.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,255.38 : 7,869.16 = 3,172.60 : x
  2. Step 2: Convert to fraction form
    5,255.38/7,869.16 = 3,172.60/x
  3. Step 3: Cross multiply
    5,255.38x = 7,869.16 × 3,172.60
  4. Step 4: Simplify right side
    5,255.38x = 24,965,697.02
  5. Step 5: Solve for x
    x = 24,965,697.02/5,255.38
  6. Step 6: Final answer
    x = 4,750.50

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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.