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Finding the Fourth Proportional to 1,995.45, 2,753.81 and 1,111.25

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Solution

The fourth proportional to 1,995.45, 2,753.81 and 1,111.25 is: 1,533.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,995.45 : 2,753.81 = 1,111.25 : x
  2. Step 2: Convert to fraction form
    1,995.45/2,753.81 = 1,111.25/x
  3. Step 3: Cross multiply
    1,995.45x = 2,753.81 × 1,111.25
  4. Step 4: Simplify right side
    1,995.45x = 3,060,152.04
  5. Step 5: Solve for x
    x = 3,060,152.04/1,995.45
  6. Step 6: Final answer
    x = 1,533.56

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