Home / 3,620.85-5,431.68-1,155.08

Finding the Fourth Proportional to 3,620.85, 5,431.68 and 1,155.08

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Solution

The fourth proportional to 3,620.85, 5,431.68 and 1,155.08 is: 1,732.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.85 : 5,431.68 = 1,155.08 : x
  2. Step 2: Convert to fraction form
    3,620.85/5,431.68 = 1,155.08/x
  3. Step 3: Cross multiply
    3,620.85x = 5,431.68 × 1,155.08
  4. Step 4: Simplify right side
    3,620.85x = 6,273,997.78
  5. Step 5: Solve for x
    x = 6,273,997.78/3,620.85
  6. Step 6: Final answer
    x = 1,732.74

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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.