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Finding the Fourth Proportional to 3,620.40, 4,996.40 and 2,027.20

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Solution

The fourth proportional to 3,620.40, 4,996.40 and 2,027.20 is: 2,797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.40 : 4,996.40 = 2,027.20 : x
  2. Step 2: Convert to fraction form
    3,620.40/4,996.40 = 2,027.20/x
  3. Step 3: Cross multiply
    3,620.40x = 4,996.40 × 2,027.20
  4. Step 4: Simplify right side
    3,620.40x = 10,128,702.08
  5. Step 5: Solve for x
    x = 10,128,702.08/3,620.40
  6. Step 6: Final answer
    x = 2,797.67

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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.