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Finding the Fourth Proportional to 3,603.60, 5,405.40 and 2,874.60

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Solution

The fourth proportional to 3,603.60, 5,405.40 and 2,874.60 is: 4,311.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,603.60 : 5,405.40 = 2,874.60 : x
  2. Step 2: Convert to fraction form
    3,603.60/5,405.40 = 2,874.60/x
  3. Step 3: Cross multiply
    3,603.60x = 5,405.40 × 2,874.60
  4. Step 4: Simplify right side
    3,603.60x = 15,538,362.84
  5. Step 5: Solve for x
    x = 15,538,362.84/3,603.60
  6. Step 6: Final answer
    x = 4,311.90

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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.