Home / 2,806.28-3,871.42-1,686.56

Finding the Fourth Proportional to 2,806.28, 3,871.42 and 1,686.56

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Solution

The fourth proportional to 2,806.28, 3,871.42 and 1,686.56 is: 2,326.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.28 : 3,871.42 = 1,686.56 : x
  2. Step 2: Convert to fraction form
    2,806.28/3,871.42 = 1,686.56/x
  3. Step 3: Cross multiply
    2,806.28x = 3,871.42 × 1,686.56
  4. Step 4: Simplify right side
    2,806.28x = 6,529,387.58
  5. Step 5: Solve for x
    x = 6,529,387.58/2,806.28
  6. Step 6: Final answer
    x = 2,326.71

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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.