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Finding the Fourth Proportional to 3,981,671, 5,972,528.38 and 989,855

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Solution

The fourth proportional to 3,981,671, 5,972,528.38 and 989,855 is: 1,484,787.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,671 : 5,972,528.38 = 989,855 : x
  2. Step 2: Convert to fraction form
    3,981,671/5,972,528.38 = 989,855/x
  3. Step 3: Cross multiply
    3,981,671x = 5,972,528.38 × 989,855
  4. Step 4: Simplify right side
    3,981,671x = 5,911,937,079,584.90
  5. Step 5: Solve for x
    x = 5,911,937,079,584.90/3,981,671
  6. Step 6: Final answer
    x = 1,484,787.94

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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.