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Finding the Fourth Proportional to 3,608.91, 5,401.80 and 1,938.87

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Solution

The fourth proportional to 3,608.91, 5,401.80 and 1,938.87 is: 2,902.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.91 : 5,401.80 = 1,938.87 : x
  2. Step 2: Convert to fraction form
    3,608.91/5,401.80 = 1,938.87/x
  3. Step 3: Cross multiply
    3,608.91x = 5,401.80 × 1,938.87
  4. Step 4: Simplify right side
    3,608.91x = 10,473,387.97
  5. Step 5: Solve for x
    x = 10,473,387.97/3,608.91
  6. Step 6: Final answer
    x = 2,902.09

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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.