Home / 2,800.35-3,863.79-1,857.51

Finding the Fourth Proportional to 2,800.35, 3,863.79 and 1,857.51

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Solution

The fourth proportional to 2,800.35, 3,863.79 and 1,857.51 is: 2,562.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.35 : 3,863.79 = 1,857.51 : x
  2. Step 2: Convert to fraction form
    2,800.35/3,863.79 = 1,857.51/x
  3. Step 3: Cross multiply
    2,800.35x = 3,863.79 × 1,857.51
  4. Step 4: Simplify right side
    2,800.35x = 7,177,028.56
  5. Step 5: Solve for x
    x = 7,177,028.56/2,800.35
  6. Step 6: Final answer
    x = 2,562.90

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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.