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Finding the Fourth Proportional to 3,981,772, 5,972,679.87 and 989,956

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Solution

The fourth proportional to 3,981,772, 5,972,679.87 and 989,956 is: 1,484,939.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,772 : 5,972,679.87 = 989,956 : x
  2. Step 2: Convert to fraction form
    3,981,772/5,972,679.87 = 989,956/x
  3. Step 3: Cross multiply
    3,981,772x = 5,972,679.87 × 989,956
  4. Step 4: Simplify right side
    3,981,772x = 5,912,690,273,385.72
  5. Step 5: Solve for x
    x = 5,912,690,273,385.72/3,981,772
  6. Step 6: Final answer
    x = 1,484,939.44

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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.