Home / 2,805.32-3,871.92-1,861.16

Finding the Fourth Proportional to 2,805.32, 3,871.92 and 1,861.16

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Solution

The fourth proportional to 2,805.32, 3,871.92 and 1,861.16 is: 2,568.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.32 : 3,871.92 = 1,861.16 : x
  2. Step 2: Convert to fraction form
    2,805.32/3,871.92 = 1,861.16/x
  3. Step 3: Cross multiply
    2,805.32x = 3,871.92 × 1,861.16
  4. Step 4: Simplify right side
    2,805.32x = 7,206,243.27
  5. Step 5: Solve for x
    x = 7,206,243.27/2,805.32
  6. Step 6: Final answer
    x = 2,568.78

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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.