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Finding the Fourth Proportional to 1,436,979.71, 1,983,079.87 and 783,641.47

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Solution

The fourth proportional to 1,436,979.71, 1,983,079.87 and 783,641.47 is: 1,081,451.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436,979.71 : 1,983,079.87 = 783,641.47 : x
  2. Step 2: Convert to fraction form
    1,436,979.71/1,983,079.87 = 783,641.47/x
  3. Step 3: Cross multiply
    1,436,979.71x = 1,983,079.87 × 783,641.47
  4. Step 4: Simplify right side
    1,436,979.71x = 1,554,023,615,578.30
  5. Step 5: Solve for x
    x = 1,554,023,615,578.30/1,436,979.71
  6. Step 6: Final answer
    x = 1,081,451.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.