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Finding the Fourth Proportional to 3,145,847, 4,718,787.78 and 781,943

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Solution

The fourth proportional to 3,145,847, 4,718,787.78 and 781,943 is: 1,172,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145,847 : 4,718,787.78 = 781,943 : x
  2. Step 2: Convert to fraction form
    3,145,847/4,718,787.78 = 781,943/x
  3. Step 3: Cross multiply
    3,145,847x = 4,718,787.78 × 781,943
  4. Step 4: Simplify right side
    3,145,847x = 3,689,823,073,056.54
  5. Step 5: Solve for x
    x = 3,689,823,073,056.54/3,145,847
  6. Step 6: Final answer
    x = 1,172,918.80

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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.