Home / 2,108.94-3,157.26-1,228.76

Finding the Fourth Proportional to 2,108.94, 3,157.26 and 1,228.76

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Solution

The fourth proportional to 2,108.94, 3,157.26 and 1,228.76 is: 1,839.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.94 : 3,157.26 = 1,228.76 : x
  2. Step 2: Convert to fraction form
    2,108.94/3,157.26 = 1,228.76/x
  3. Step 3: Cross multiply
    2,108.94x = 3,157.26 × 1,228.76
  4. Step 4: Simplify right side
    2,108.94x = 3,879,499.01
  5. Step 5: Solve for x
    x = 3,879,499.01/2,108.94
  6. Step 6: Final answer
    x = 1,839.55

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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.