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Finding the Fourth Proportional to 3,963.94, 5,470.28 and 2,195.72

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Solution

The fourth proportional to 3,963.94, 5,470.28 and 2,195.72 is: 3,030.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,963.94 : 5,470.28 = 2,195.72 : x
  2. Step 2: Convert to fraction form
    3,963.94/5,470.28 = 2,195.72/x
  3. Step 3: Cross multiply
    3,963.94x = 5,470.28 × 2,195.72
  4. Step 4: Simplify right side
    3,963.94x = 12,011,203.20
  5. Step 5: Solve for x
    x = 12,011,203.20/3,963.94
  6. Step 6: Final answer
    x = 3,030.12

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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.