Home / 2,072.08-3,107.67-685.09

Finding the Fourth Proportional to 2,072.08, 3,107.67 and 685.09

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Solution

The fourth proportional to 2,072.08, 3,107.67 and 685.09 is: 1,027.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.08 : 3,107.67 = 685.09 : x
  2. Step 2: Convert to fraction form
    2,072.08/3,107.67 = 685.09/x
  3. Step 3: Cross multiply
    2,072.08x = 3,107.67 × 685.09
  4. Step 4: Simplify right side
    2,072.08x = 2,129,014.68
  5. Step 5: Solve for x
    x = 2,129,014.68/2,072.08
  6. Step 6: Final answer
    x = 1,027.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.