Home / 3,938.85-5,906.76-1,305.56

Finding the Fourth Proportional to 3,938.85, 5,906.76 and 1,305.56

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Solution

The fourth proportional to 3,938.85, 5,906.76 and 1,305.56 is: 1,957.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.85 : 5,906.76 = 1,305.56 : x
  2. Step 2: Convert to fraction form
    3,938.85/5,906.76 = 1,305.56/x
  3. Step 3: Cross multiply
    3,938.85x = 5,906.76 × 1,305.56
  4. Step 4: Simplify right side
    3,938.85x = 7,711,600.05
  5. Step 5: Solve for x
    x = 7,711,600.05/3,938.85
  6. Step 6: Final answer
    x = 1,957.83

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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.