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Finding the Fourth Proportional to 827,991.70, 1,241,987.55 and 827,991.70

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Solution

The fourth proportional to 827,991.70, 1,241,987.55 and 827,991.70 is: 1,241,987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,991.70 : 1,241,987.55 = 827,991.70 : x
  2. Step 2: Convert to fraction form
    827,991.70/1,241,987.55 = 827,991.70/x
  3. Step 3: Cross multiply
    827,991.70x = 1,241,987.55 × 827,991.70
  4. Step 4: Simplify right side
    827,991.70x = 1,028,355,382,903.34
  5. Step 5: Solve for x
    x = 1,028,355,382,903.34/827,991.70
  6. Step 6: Final answer
    x = 1,241,987.55

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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.