Home / 1,947.80-2,687.96-1,161.84

Finding the Fourth Proportional to 1,947.80, 2,687.96 and 1,161.84

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Solution

The fourth proportional to 1,947.80, 2,687.96 and 1,161.84 is: 1,603.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.80 : 2,687.96 = 1,161.84 : x
  2. Step 2: Convert to fraction form
    1,947.80/2,687.96 = 1,161.84/x
  3. Step 3: Cross multiply
    1,947.80x = 2,687.96 × 1,161.84
  4. Step 4: Simplify right side
    1,947.80x = 3,122,989.16
  5. Step 5: Solve for x
    x = 3,122,989.16/1,947.80
  6. Step 6: Final answer
    x = 1,603.34

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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.