Home / 2,787.97-4,182.65-1,122.21

Finding the Fourth Proportional to 2,787.97, 4,182.65 and 1,122.21

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Solution

The fourth proportional to 2,787.97, 4,182.65 and 1,122.21 is: 1,683.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.97 : 4,182.65 = 1,122.21 : x
  2. Step 2: Convert to fraction form
    2,787.97/4,182.65 = 1,122.21/x
  3. Step 3: Cross multiply
    2,787.97x = 4,182.65 × 1,122.21
  4. Step 4: Simplify right side
    2,787.97x = 4,693,794.57
  5. Step 5: Solve for x
    x = 4,693,794.57/2,787.97
  6. Step 6: Final answer
    x = 1,683.59

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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.