Home / 2,107.45-2,908.19-1,223.20

Finding the Fourth Proportional to 2,107.45, 2,908.19 and 1,223.20

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Solution

The fourth proportional to 2,107.45, 2,908.19 and 1,223.20 is: 1,687.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.45 : 2,908.19 = 1,223.20 : x
  2. Step 2: Convert to fraction form
    2,107.45/2,908.19 = 1,223.20/x
  3. Step 3: Cross multiply
    2,107.45x = 2,908.19 × 1,223.20
  4. Step 4: Simplify right side
    2,107.45x = 3,557,277.35
  5. Step 5: Solve for x
    x = 3,557,277.35/2,107.45
  6. Step 6: Final answer
    x = 1,687.96

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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.