Home / 2,105.20-3,168.91-1,904.20

Finding the Fourth Proportional to 2,105.20, 3,168.91 and 1,904.20

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Solution

The fourth proportional to 2,105.20, 3,168.91 and 1,904.20 is: 2,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.20 : 3,168.91 = 1,904.20 : x
  2. Step 2: Convert to fraction form
    2,105.20/3,168.91 = 1,904.20/x
  3. Step 3: Cross multiply
    2,105.20x = 3,168.91 × 1,904.20
  4. Step 4: Simplify right side
    2,105.20x = 6,034,238.42
  5. Step 5: Solve for x
    x = 6,034,238.42/2,105.20
  6. Step 6: Final answer
    x = 2,866.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.