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Finding the Fourth Proportional to 3,787.84, 5,677.91 and 1,447.21

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Solution

The fourth proportional to 3,787.84, 5,677.91 and 1,447.21 is: 2,169.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.84 : 5,677.91 = 1,447.21 : x
  2. Step 2: Convert to fraction form
    3,787.84/5,677.91 = 1,447.21/x
  3. Step 3: Cross multiply
    3,787.84x = 5,677.91 × 1,447.21
  4. Step 4: Simplify right side
    3,787.84x = 8,217,128.13
  5. Step 5: Solve for x
    x = 8,217,128.13/3,787.84
  6. Step 6: Final answer
    x = 2,169.34

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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.