Home / 3,410.20-5,115.66-1,561.78

Finding the Fourth Proportional to 3,410.20, 5,115.66 and 1,561.78

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Solution

The fourth proportional to 3,410.20, 5,115.66 and 1,561.78 is: 2,342.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,410.20 : 5,115.66 = 1,561.78 : x
  2. Step 2: Convert to fraction form
    3,410.20/5,115.66 = 1,561.78/x
  3. Step 3: Cross multiply
    3,410.20x = 5,115.66 × 1,561.78
  4. Step 4: Simplify right side
    3,410.20x = 7,989,535.47
  5. Step 5: Solve for x
    x = 7,989,535.47/3,410.20
  6. Step 6: Final answer
    x = 2,342.83

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1.5x scale

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.