Home / 2,240.20-3,091.58-1,245.45

Finding the Fourth Proportional to 2,240.20, 3,091.58 and 1,245.45

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Solution

The fourth proportional to 2,240.20, 3,091.58 and 1,245.45 is: 1,718.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,240.20 : 3,091.58 = 1,245.45 : x
  2. Step 2: Convert to fraction form
    2,240.20/3,091.58 = 1,245.45/x
  3. Step 3: Cross multiply
    2,240.20x = 3,091.58 × 1,245.45
  4. Step 4: Simplify right side
    2,240.20x = 3,850,408.31
  5. Step 5: Solve for x
    x = 3,850,408.31/2,240.20
  6. Step 6: Final answer
    x = 1,718.78

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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.