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Finding the Fourth Proportional to 1,839,765.80, 2,755,712.10 and 1,640,311.40

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Solution

The fourth proportional to 1,839,765.80, 2,755,712.10 and 1,640,311.40 is: 2,456,957.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839,765.80 : 2,755,712.10 = 1,640,311.40 : x
  2. Step 2: Convert to fraction form
    1,839,765.80/2,755,712.10 = 1,640,311.40/x
  3. Step 3: Cross multiply
    1,839,765.80x = 2,755,712.10 × 1,640,311.40
  4. Step 4: Simplify right side
    1,839,765.80x = 4,520,225,972,747.94
  5. Step 5: Solve for x
    x = 4,520,225,972,747.94/1,839,765.80
  6. Step 6: Final answer
    x = 2,456,957.28

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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.