Home / 2,787.12-4,179.96-1,323.36

Finding the Fourth Proportional to 2,787.12, 4,179.96 and 1,323.36

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Solution

The fourth proportional to 2,787.12, 4,179.96 and 1,323.36 is: 1,984.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.12 : 4,179.96 = 1,323.36 : x
  2. Step 2: Convert to fraction form
    2,787.12/4,179.96 = 1,323.36/x
  3. Step 3: Cross multiply
    2,787.12x = 4,179.96 × 1,323.36
  4. Step 4: Simplify right side
    2,787.12x = 5,531,591.87
  5. Step 5: Solve for x
    x = 5,531,591.87/2,787.12
  6. Step 6: Final answer
    x = 1,984.70

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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.