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Finding the Fourth Proportional to 2,571.02, 3,856.07 and 839.64

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Solution

The fourth proportional to 2,571.02, 3,856.07 and 839.64 is: 1,259.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,571.02 : 3,856.07 = 839.64 : x
  2. Step 2: Convert to fraction form
    2,571.02/3,856.07 = 839.64/x
  3. Step 3: Cross multiply
    2,571.02x = 3,856.07 × 839.64
  4. Step 4: Simplify right side
    2,571.02x = 3,237,710.61
  5. Step 5: Solve for x
    x = 3,237,710.61/2,571.02
  6. Step 6: Final answer
    x = 1,259.31

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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.