Home / 2,680.92-3,698.64-1,561.68

Finding the Fourth Proportional to 2,680.92, 3,698.64 and 1,561.68

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Solution

The fourth proportional to 2,680.92, 3,698.64 and 1,561.68 is: 2,154.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.92 : 3,698.64 = 1,561.68 : x
  2. Step 2: Convert to fraction form
    2,680.92/3,698.64 = 1,561.68/x
  3. Step 3: Cross multiply
    2,680.92x = 3,698.64 × 1,561.68
  4. Step 4: Simplify right side
    2,680.92x = 5,776,092.12
  5. Step 5: Solve for x
    x = 5,776,092.12/2,680.92
  6. Step 6: Final answer
    x = 2,154.52

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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.