Home / 2,112.78-3,169.16-1,176.30

Finding the Fourth Proportional to 2,112.78, 3,169.16 and 1,176.30

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Solution

The fourth proportional to 2,112.78, 3,169.16 and 1,176.30 is: 1,764.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.78 : 3,169.16 = 1,176.30 : x
  2. Step 2: Convert to fraction form
    2,112.78/3,169.16 = 1,176.30/x
  3. Step 3: Cross multiply
    2,112.78x = 3,169.16 × 1,176.30
  4. Step 4: Simplify right side
    2,112.78x = 3,727,882.91
  5. Step 5: Solve for x
    x = 3,727,882.91/2,112.78
  6. Step 6: Final answer
    x = 1,764.44

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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.