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Finding the Fourth Proportional to 2,660.56, 3,991.02 and 1,938.76

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Solution

The fourth proportional to 2,660.56, 3,991.02 and 1,938.76 is: 2,908.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.56 : 3,991.02 = 1,938.76 : x
  2. Step 2: Convert to fraction form
    2,660.56/3,991.02 = 1,938.76/x
  3. Step 3: Cross multiply
    2,660.56x = 3,991.02 × 1,938.76
  4. Step 4: Simplify right side
    2,660.56x = 7,737,629.94
  5. Step 5: Solve for x
    x = 7,737,629.94/2,660.56
  6. Step 6: Final answer
    x = 2,908.27

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1.5x scale

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.