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Finding the Fourth Proportional to 2,787.14, 4,181.11 and 839.49

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Solution

The fourth proportional to 2,787.14, 4,181.11 and 839.49 is: 1,259.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.14 : 4,181.11 = 839.49 : x
  2. Step 2: Convert to fraction form
    2,787.14/4,181.11 = 839.49/x
  3. Step 3: Cross multiply
    2,787.14x = 4,181.11 × 839.49
  4. Step 4: Simplify right side
    2,787.14x = 3,509,997.94
  5. Step 5: Solve for x
    x = 3,509,997.94/2,787.14
  6. Step 6: Final answer
    x = 1,259.36

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1.5x scale

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.