Home / 2,680.97-3,699.68-1,561.83

Finding the Fourth Proportional to 2,680.97, 3,699.68 and 1,561.83

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Solution

The fourth proportional to 2,680.97, 3,699.68 and 1,561.83 is: 2,155.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.97 : 3,699.68 = 1,561.83 : x
  2. Step 2: Convert to fraction form
    2,680.97/3,699.68 = 1,561.83/x
  3. Step 3: Cross multiply
    2,680.97x = 3,699.68 × 1,561.83
  4. Step 4: Simplify right side
    2,680.97x = 5,778,280.75
  5. Step 5: Solve for x
    x = 5,778,280.75/2,680.97
  6. Step 6: Final answer
    x = 2,155.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.