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Finding the Fourth Proportional to 2,643, 3,963.22 and 1,255.48

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Solution

The fourth proportional to 2,643, 3,963.22 and 1,255.48 is: 1,882.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643 : 3,963.22 = 1,255.48 : x
  2. Step 2: Convert to fraction form
    2,643/3,963.22 = 1,255.48/x
  3. Step 3: Cross multiply
    2,643x = 3,963.22 × 1,255.48
  4. Step 4: Simplify right side
    2,643x = 4,975,743.45
  5. Step 5: Solve for x
    x = 4,975,743.45/2,643
  6. Step 6: Final answer
    x = 1,882.61

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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.