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Finding the Fourth Proportional to 1,571,798, 2,169,081.28 and 856,406

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Solution

The fourth proportional to 1,571,798, 2,169,081.28 and 856,406 is: 1,181,840.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571,798 : 2,169,081.28 = 856,406 : x
  2. Step 2: Convert to fraction form
    1,571,798/2,169,081.28 = 856,406/x
  3. Step 3: Cross multiply
    1,571,798x = 2,169,081.28 × 856,406
  4. Step 4: Simplify right side
    1,571,798x = 1,857,614,222,679.68
  5. Step 5: Solve for x
    x = 1,857,614,222,679.68/1,571,798
  6. Step 6: Final answer
    x = 1,181,840.30

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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.