Home / 3,619.20-5,427.68-1,428.60

Finding the Fourth Proportional to 3,619.20, 5,427.68 and 1,428.60

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Solution

The fourth proportional to 3,619.20, 5,427.68 and 1,428.60 is: 2,142.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.20 : 5,427.68 = 1,428.60 : x
  2. Step 2: Convert to fraction form
    3,619.20/5,427.68 = 1,428.60/x
  3. Step 3: Cross multiply
    3,619.20x = 5,427.68 × 1,428.60
  4. Step 4: Simplify right side
    3,619.20x = 7,753,983.65
  5. Step 5: Solve for x
    x = 7,753,983.65/3,619.20
  6. Step 6: Final answer
    x = 2,142.46

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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.