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Finding the Fourth Proportional to 1,981,756.38, 2,971,905.41 and 684,578.66

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Solution

The fourth proportional to 1,981,756.38, 2,971,905.41 and 684,578.66 is: 1,026,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,756.38 : 2,971,905.41 = 684,578.66 : x
  2. Step 2: Convert to fraction form
    1,981,756.38/2,971,905.41 = 684,578.66/x
  3. Step 3: Cross multiply
    1,981,756.38x = 2,971,905.41 × 684,578.66
  4. Step 4: Simplify right side
    1,981,756.38x = 2,034,503,004,942.13
  5. Step 5: Solve for x
    x = 2,034,503,004,942.13/1,981,756.38
  6. Step 6: Final answer
    x = 1,026,616.10

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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.