Home / 3,086.72-4,261.20-1,908.40

Finding the Fourth Proportional to 3,086.72, 4,261.20 and 1,908.40

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Solution

The fourth proportional to 3,086.72, 4,261.20 and 1,908.40 is: 2,634.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.72 : 4,261.20 = 1,908.40 : x
  2. Step 2: Convert to fraction form
    3,086.72/4,261.20 = 1,908.40/x
  3. Step 3: Cross multiply
    3,086.72x = 4,261.20 × 1,908.40
  4. Step 4: Simplify right side
    3,086.72x = 8,132,074.08
  5. Step 5: Solve for x
    x = 8,132,074.08/3,086.72
  6. Step 6: Final answer
    x = 2,634.54

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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.