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Finding the Fourth Proportional to 1,863.73, 2,571.09 and 1,200.80

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Solution

The fourth proportional to 1,863.73, 2,571.09 and 1,200.80 is: 1,656.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.73 : 2,571.09 = 1,200.80 : x
  2. Step 2: Convert to fraction form
    1,863.73/2,571.09 = 1,200.80/x
  3. Step 3: Cross multiply
    1,863.73x = 2,571.09 × 1,200.80
  4. Step 4: Simplify right side
    1,863.73x = 3,087,366.32
  5. Step 5: Solve for x
    x = 3,087,366.32/1,863.73
  6. Step 6: Final answer
    x = 1,656.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.