Home / 2,081.16-3,120.57-693.75

Finding the Fourth Proportional to 2,081.16, 3,120.57 and 693.75

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Solution

The fourth proportional to 2,081.16, 3,120.57 and 693.75 is: 1,040.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.16 : 3,120.57 = 693.75 : x
  2. Step 2: Convert to fraction form
    2,081.16/3,120.57 = 693.75/x
  3. Step 3: Cross multiply
    2,081.16x = 3,120.57 × 693.75
  4. Step 4: Simplify right side
    2,081.16x = 2,164,895.44
  5. Step 5: Solve for x
    x = 2,164,895.44/2,081.16
  6. Step 6: Final answer
    x = 1,040.23

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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.