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Finding the Fourth Proportional to 1,857,776.80, 2,786,009.10 and 659,738.20

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Solution

The fourth proportional to 1,857,776.80, 2,786,009.10 and 659,738.20 is: 989,374.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857,776.80 : 2,786,009.10 = 659,738.20 : x
  2. Step 2: Convert to fraction form
    1,857,776.80/2,786,009.10 = 659,738.20/x
  3. Step 3: Cross multiply
    1,857,776.80x = 2,786,009.10 × 659,738.20
  4. Step 4: Simplify right side
    1,857,776.80x = 1,838,036,628,817.62
  5. Step 5: Solve for x
    x = 1,838,036,628,817.62/1,857,776.80
  6. Step 6: Final answer
    x = 989,374.30

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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.