Home / 1,921.14-2,650.90-1,081.80

Finding the Fourth Proportional to 1,921.14, 2,650.90 and 1,081.80

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Solution

The fourth proportional to 1,921.14, 2,650.90 and 1,081.80 is: 1,492.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.14 : 2,650.90 = 1,081.80 : x
  2. Step 2: Convert to fraction form
    1,921.14/2,650.90 = 1,081.80/x
  3. Step 3: Cross multiply
    1,921.14x = 2,650.90 × 1,081.80
  4. Step 4: Simplify right side
    1,921.14x = 2,867,743.62
  5. Step 5: Solve for x
    x = 2,867,743.62/1,921.14
  6. Step 6: Final answer
    x = 1,492.73

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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.