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Finding the Fourth Proportional to 3,857.57, 5,787.26 and 1,260.50

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Solution

The fourth proportional to 3,857.57, 5,787.26 and 1,260.50 is: 1,891.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.57 : 5,787.26 = 1,260.50 : x
  2. Step 2: Convert to fraction form
    3,857.57/5,787.26 = 1,260.50/x
  3. Step 3: Cross multiply
    3,857.57x = 5,787.26 × 1,260.50
  4. Step 4: Simplify right side
    3,857.57x = 7,294,841.23
  5. Step 5: Solve for x
    x = 7,294,841.23/3,857.57
  6. Step 6: Final answer
    x = 1,891.05

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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.