Home / 2,687.94-4,029.08-1,228.05

Finding the Fourth Proportional to 2,687.94, 4,029.08 and 1,228.05

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Solution

The fourth proportional to 2,687.94, 4,029.08 and 1,228.05 is: 1,840.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.94 : 4,029.08 = 1,228.05 : x
  2. Step 2: Convert to fraction form
    2,687.94/4,029.08 = 1,228.05/x
  3. Step 3: Cross multiply
    2,687.94x = 4,029.08 × 1,228.05
  4. Step 4: Simplify right side
    2,687.94x = 4,947,905.55
  5. Step 5: Solve for x
    x = 4,947,905.55/2,687.94
  6. Step 6: Final answer
    x = 1,840.78

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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.