Home / 3,857.32-5,786.25-1,909

Finding the Fourth Proportional to 3,857.32, 5,786.25 and 1,909

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Solution

The fourth proportional to 3,857.32, 5,786.25 and 1,909 is: 2,863.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.32 : 5,786.25 = 1,909 : x
  2. Step 2: Convert to fraction form
    3,857.32/5,786.25 = 1,909/x
  3. Step 3: Cross multiply
    3,857.32x = 5,786.25 × 1,909
  4. Step 4: Simplify right side
    3,857.32x = 11,045,951.25
  5. Step 5: Solve for x
    x = 11,045,951.25/3,857.32
  6. Step 6: Final answer
    x = 2,863.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.