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Finding the Fourth Proportional to 6,440.43, 8,887.78 and 3,787.84

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Solution

The fourth proportional to 6,440.43, 8,887.78 and 3,787.84 is: 5,227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440.43 : 8,887.78 = 3,787.84 : x
  2. Step 2: Convert to fraction form
    6,440.43/8,887.78 = 3,787.84/x
  3. Step 3: Cross multiply
    6,440.43x = 8,887.78 × 3,787.84
  4. Step 4: Simplify right side
    6,440.43x = 33,665,488.60
  5. Step 5: Solve for x
    x = 33,665,488.60/6,440.43
  6. Step 6: Final answer
    x = 5,227.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.