Home / 2,787.88-4,178.46-1,863.40

Finding the Fourth Proportional to 2,787.88, 4,178.46 and 1,863.40

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Solution

The fourth proportional to 2,787.88, 4,178.46 and 1,863.40 is: 2,792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.88 : 4,178.46 = 1,863.40 : x
  2. Step 2: Convert to fraction form
    2,787.88/4,178.46 = 1,863.40/x
  3. Step 3: Cross multiply
    2,787.88x = 4,178.46 × 1,863.40
  4. Step 4: Simplify right side
    2,787.88x = 7,786,142.36
  5. Step 5: Solve for x
    x = 7,786,142.36/2,787.88
  6. Step 6: Final answer
    x = 2,792.85

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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.