Home / 1,422.11-1,963.41-1,089.92

Finding the Fourth Proportional to 1,422.11, 1,963.41 and 1,089.92

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Solution

The fourth proportional to 1,422.11, 1,963.41 and 1,089.92 is: 1,504.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.11 : 1,963.41 = 1,089.92 : x
  2. Step 2: Convert to fraction form
    1,422.11/1,963.41 = 1,089.92/x
  3. Step 3: Cross multiply
    1,422.11x = 1,963.41 × 1,089.92
  4. Step 4: Simplify right side
    1,422.11x = 2,139,959.83
  5. Step 5: Solve for x
    x = 2,139,959.83/1,422.11
  6. Step 6: Final answer
    x = 1,504.78

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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.