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Finding the Fourth Proportional to 2,593,928, 3,890,909.28 and 821,000

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Solution

The fourth proportional to 2,593,928, 3,890,909.28 and 821,000 is: 1,231,505.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,593,928 : 3,890,909.28 = 821,000 : x
  2. Step 2: Convert to fraction form
    2,593,928/3,890,909.28 = 821,000/x
  3. Step 3: Cross multiply
    2,593,928x = 3,890,909.28 × 821,000
  4. Step 4: Simplify right side
    2,593,928x = 3,194,436,518,880
  5. Step 5: Solve for x
    x = 3,194,436,518,880/2,593,928
  6. Step 6: Final answer
    x = 1,231,505.47

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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.