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Finding the Fourth Proportional to 2,722.87, 4,086.87 and 1,425.25

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Solution

The fourth proportional to 2,722.87, 4,086.87 and 1,425.25 is: 2,139.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,722.87 : 4,086.87 = 1,425.25 : x
  2. Step 2: Convert to fraction form
    2,722.87/4,086.87 = 1,425.25/x
  3. Step 3: Cross multiply
    2,722.87x = 4,086.87 × 1,425.25
  4. Step 4: Simplify right side
    2,722.87x = 5,824,811.47
  5. Step 5: Solve for x
    x = 5,824,811.47/2,722.87
  6. Step 6: Final answer
    x = 2,139.22

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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.