Home / 3,620.80-5,431.50-1,155.97

Finding the Fourth Proportional to 3,620.80, 5,431.50 and 1,155.97

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Solution

The fourth proportional to 3,620.80, 5,431.50 and 1,155.97 is: 1,734.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.80 : 5,431.50 = 1,155.97 : x
  2. Step 2: Convert to fraction form
    3,620.80/5,431.50 = 1,155.97/x
  3. Step 3: Cross multiply
    3,620.80x = 5,431.50 × 1,155.97
  4. Step 4: Simplify right side
    3,620.80x = 6,278,651.06
  5. Step 5: Solve for x
    x = 6,278,651.06/3,620.80
  6. Step 6: Final answer
    x = 1,734.05

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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.