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Finding the Fourth Proportional to 3,857.56, 5,786.92 and 1,259.88

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Solution

The fourth proportional to 3,857.56, 5,786.92 and 1,259.88 is: 1,890.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.56 : 5,786.92 = 1,259.88 : x
  2. Step 2: Convert to fraction form
    3,857.56/5,786.92 = 1,259.88/x
  3. Step 3: Cross multiply
    3,857.56x = 5,786.92 × 1,259.88
  4. Step 4: Simplify right side
    3,857.56x = 7,290,824.77
  5. Step 5: Solve for x
    x = 7,290,824.77/3,857.56
  6. Step 6: Final answer
    x = 1,890.01

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1.5x scale

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.