Home / 2,787.68-4,178.34-1,142.12

Finding the Fourth Proportional to 2,787.68, 4,178.34 and 1,142.12

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Solution

The fourth proportional to 2,787.68, 4,178.34 and 1,142.12 is: 1,711.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.68 : 4,178.34 = 1,142.12 : x
  2. Step 2: Convert to fraction form
    2,787.68/4,178.34 = 1,142.12/x
  3. Step 3: Cross multiply
    2,787.68x = 4,178.34 × 1,142.12
  4. Step 4: Simplify right side
    2,787.68x = 4,772,165.68
  5. Step 5: Solve for x
    x = 4,772,165.68/2,787.68
  6. Step 6: Final answer
    x = 1,711.88

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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.