Home / 2,859-3,944.82-1,680.20

Finding the Fourth Proportional to 2,859, 3,944.82 and 1,680.20

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Solution

The fourth proportional to 2,859, 3,944.82 and 1,680.20 is: 2,318.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859 : 3,944.82 = 1,680.20 : x
  2. Step 2: Convert to fraction form
    2,859/3,944.82 = 1,680.20/x
  3. Step 3: Cross multiply
    2,859x = 3,944.82 × 1,680.20
  4. Step 4: Simplify right side
    2,859x = 6,628,086.56
  5. Step 5: Solve for x
    x = 6,628,086.56/2,859
  6. Step 6: Final answer
    x = 2,318.32

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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.