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Finding the Fourth Proportional to 3,468.87, 5,202.74 and 1,128.56

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Solution

The fourth proportional to 3,468.87, 5,202.74 and 1,128.56 is: 1,692.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,468.87 : 5,202.74 = 1,128.56 : x
  2. Step 2: Convert to fraction form
    3,468.87/5,202.74 = 1,128.56/x
  3. Step 3: Cross multiply
    3,468.87x = 5,202.74 × 1,128.56
  4. Step 4: Simplify right side
    3,468.87x = 5,871,581.06
  5. Step 5: Solve for x
    x = 5,871,581.06/3,468.87
  6. Step 6: Final answer
    x = 1,692.65

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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.