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Finding the Fourth Proportional to 1,896.86, 2,616.62 and 1,189.74

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Solution

The fourth proportional to 1,896.86, 2,616.62 and 1,189.74 is: 1,641.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,896.86 : 2,616.62 = 1,189.74 : x
  2. Step 2: Convert to fraction form
    1,896.86/2,616.62 = 1,189.74/x
  3. Step 3: Cross multiply
    1,896.86x = 2,616.62 × 1,189.74
  4. Step 4: Simplify right side
    1,896.86x = 3,113,097.48
  5. Step 5: Solve for x
    x = 3,113,097.48/1,896.86
  6. Step 6: Final answer
    x = 1,641.18

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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.