Home / 2,107.82-2,908.34-1,223.17

Finding the Fourth Proportional to 2,107.82, 2,908.34 and 1,223.17

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Solution

The fourth proportional to 2,107.82, 2,908.34 and 1,223.17 is: 1,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.82 : 2,908.34 = 1,223.17 : x
  2. Step 2: Convert to fraction form
    2,107.82/2,908.34 = 1,223.17/x
  3. Step 3: Cross multiply
    2,107.82x = 2,908.34 × 1,223.17
  4. Step 4: Simplify right side
    2,107.82x = 3,557,385.44
  5. Step 5: Solve for x
    x = 3,557,385.44/2,107.82
  6. Step 6: Final answer
    x = 1,687.71

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1.5x scale

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.