Home / 1,947.11-2,686.57-1,161

Finding the Fourth Proportional to 1,947.11, 2,686.57 and 1,161

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Solution

The fourth proportional to 1,947.11, 2,686.57 and 1,161 is: 1,601.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.11 : 2,686.57 = 1,161 : x
  2. Step 2: Convert to fraction form
    1,947.11/2,686.57 = 1,161/x
  3. Step 3: Cross multiply
    1,947.11x = 2,686.57 × 1,161
  4. Step 4: Simplify right side
    1,947.11x = 3,119,104.87
  5. Step 5: Solve for x
    x = 3,119,104.87/1,947.11
  6. Step 6: Final answer
    x = 1,601.92

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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.