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Finding the Fourth Proportional to 3,787.84, 5,227.20 and 2,109.40

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Solution

The fourth proportional to 3,787.84, 5,227.20 and 2,109.40 is: 2,910.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,787.84 : 5,227.20 = 2,109.40 : x
  2. Step 2: Convert to fraction form
    3,787.84/5,227.20 = 2,109.40/x
  3. Step 3: Cross multiply
    3,787.84x = 5,227.20 × 2,109.40
  4. Step 4: Simplify right side
    3,787.84x = 11,026,255.68
  5. Step 5: Solve for x
    x = 11,026,255.68/3,787.84
  6. Step 6: Final answer
    x = 2,910.96

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1.5x scale

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.