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Finding the Fourth Proportional to 1,383,505, 1,909,266.06 and 779,893

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Solution

The fourth proportional to 1,383,505, 1,909,266.06 and 779,893 is: 1,076,268.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,505 : 1,909,266.06 = 779,893 : x
  2. Step 2: Convert to fraction form
    1,383,505/1,909,266.06 = 779,893/x
  3. Step 3: Cross multiply
    1,383,505x = 1,909,266.06 × 779,893
  4. Step 4: Simplify right side
    1,383,505x = 1,489,023,235,331.58
  5. Step 5: Solve for x
    x = 1,489,023,235,331.58/1,383,505
  6. Step 6: Final answer
    x = 1,076,268.78

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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.