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Finding the Fourth Proportional to 1,673,185.72, 2,309,331.54 and 993,991

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Solution

The fourth proportional to 1,673,185.72, 2,309,331.54 and 993,991 is: 1,371,906.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,673,185.72 : 2,309,331.54 = 993,991 : x
  2. Step 2: Convert to fraction form
    1,673,185.72/2,309,331.54 = 993,991/x
  3. Step 3: Cross multiply
    1,673,185.72x = 2,309,331.54 × 993,991
  4. Step 4: Simplify right side
    1,673,185.72x = 2,295,454,766,776.14
  5. Step 5: Solve for x
    x = 2,295,454,766,776.14/1,673,185.72
  6. Step 6: Final answer
    x = 1,371,906.74

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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.