Home / 2,787.78-4,181.70-1,327.08

Finding the Fourth Proportional to 2,787.78, 4,181.70 and 1,327.08

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Solution

The fourth proportional to 2,787.78, 4,181.70 and 1,327.08 is: 1,990.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.78 : 4,181.70 = 1,327.08 : x
  2. Step 2: Convert to fraction form
    2,787.78/4,181.70 = 1,327.08/x
  3. Step 3: Cross multiply
    2,787.78x = 4,181.70 × 1,327.08
  4. Step 4: Simplify right side
    2,787.78x = 5,549,450.44
  5. Step 5: Solve for x
    x = 5,549,450.44/2,787.78
  6. Step 6: Final answer
    x = 1,990.63

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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.