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Finding the Fourth Proportional to 3,280.43, 4,892.95 and 2,787.95

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Solution

The fourth proportional to 3,280.43, 4,892.95 and 2,787.95 is: 4,158.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.43 : 4,892.95 = 2,787.95 : x
  2. Step 2: Convert to fraction form
    3,280.43/4,892.95 = 2,787.95/x
  3. Step 3: Cross multiply
    3,280.43x = 4,892.95 × 2,787.95
  4. Step 4: Simplify right side
    3,280.43x = 13,641,299.95
  5. Step 5: Solve for x
    x = 13,641,299.95/3,280.43
  6. Step 6: Final answer
    x = 4,158.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.