Home / 2,120.39-3,176.75-885.65

Finding the Fourth Proportional to 2,120.39, 3,176.75 and 885.65

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Solution

The fourth proportional to 2,120.39, 3,176.75 and 885.65 is: 1,326.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.39 : 3,176.75 = 885.65 : x
  2. Step 2: Convert to fraction form
    2,120.39/3,176.75 = 885.65/x
  3. Step 3: Cross multiply
    2,120.39x = 3,176.75 × 885.65
  4. Step 4: Simplify right side
    2,120.39x = 2,813,468.33
  5. Step 5: Solve for x
    x = 2,813,468.33/2,120.39
  6. Step 6: Final answer
    x = 1,326.87

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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.