Home / 3,857.85-5,783.31-1,392.09

Finding the Fourth Proportional to 3,857.85, 5,783.31 and 1,392.09

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Solution

The fourth proportional to 3,857.85, 5,783.31 and 1,392.09 is: 2,086.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.85 : 5,783.31 = 1,392.09 : x
  2. Step 2: Convert to fraction form
    3,857.85/5,783.31 = 1,392.09/x
  3. Step 3: Cross multiply
    3,857.85x = 5,783.31 × 1,392.09
  4. Step 4: Simplify right side
    3,857.85x = 8,050,888.02
  5. Step 5: Solve for x
    x = 8,050,888.02/3,857.85
  6. Step 6: Final answer
    x = 2,086.88

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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.