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Finding the Fourth Proportional to 2,571.06, 3,857.30 and 839.69

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Solution

The fourth proportional to 2,571.06, 3,857.30 and 839.69 is: 1,259.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,571.06 : 3,857.30 = 839.69 : x
  2. Step 2: Convert to fraction form
    2,571.06/3,857.30 = 839.69/x
  3. Step 3: Cross multiply
    2,571.06x = 3,857.30 × 839.69
  4. Step 4: Simplify right side
    2,571.06x = 3,238,936.24
  5. Step 5: Solve for x
    x = 3,238,936.24/2,571.06
  6. Step 6: Final answer
    x = 1,259.77

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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.