Home / 2,107.11-2,907.80-1,223.43

Finding the Fourth Proportional to 2,107.11, 2,907.80 and 1,223.43

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Solution

The fourth proportional to 2,107.11, 2,907.80 and 1,223.43 is: 1,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.11 : 2,907.80 = 1,223.43 : x
  2. Step 2: Convert to fraction form
    2,107.11/2,907.80 = 1,223.43/x
  3. Step 3: Cross multiply
    2,107.11x = 2,907.80 × 1,223.43
  4. Step 4: Simplify right side
    2,107.11x = 3,557,489.75
  5. Step 5: Solve for x
    x = 3,557,489.75/2,107.11
  6. Step 6: Final answer
    x = 1,688.33

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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.