Home / 3,620.46-5,427-1,428.30

Finding the Fourth Proportional to 3,620.46, 5,427 and 1,428.30

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Solution

The fourth proportional to 3,620.46, 5,427 and 1,428.30 is: 2,140.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.46 : 5,427 = 1,428.30 : x
  2. Step 2: Convert to fraction form
    3,620.46/5,427 = 1,428.30/x
  3. Step 3: Cross multiply
    3,620.46x = 5,427 × 1,428.30
  4. Step 4: Simplify right side
    3,620.46x = 7,751,384.10
  5. Step 5: Solve for x
    x = 7,751,384.10/3,620.46
  6. Step 6: Final answer
    x = 2,140.99

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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.