Home / 2,091.84-3,138.24-1,118.88

Finding the Fourth Proportional to 2,091.84, 3,138.24 and 1,118.88

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Solution

The fourth proportional to 2,091.84, 3,138.24 and 1,118.88 is: 1,678.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.84 : 3,138.24 = 1,118.88 : x
  2. Step 2: Convert to fraction form
    2,091.84/3,138.24 = 1,118.88/x
  3. Step 3: Cross multiply
    2,091.84x = 3,138.24 × 1,118.88
  4. Step 4: Simplify right side
    2,091.84x = 3,511,313.97
  5. Step 5: Solve for x
    x = 3,511,313.97/2,091.84
  6. Step 6: Final answer
    x = 1,678.58

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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.