Home / 2,081.48-3,122.70-1,107.40

Finding the Fourth Proportional to 2,081.48, 3,122.70 and 1,107.40

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Solution

The fourth proportional to 2,081.48, 3,122.70 and 1,107.40 is: 1,661.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.48 : 3,122.70 = 1,107.40 : x
  2. Step 2: Convert to fraction form
    2,081.48/3,122.70 = 1,107.40/x
  3. Step 3: Cross multiply
    2,081.48x = 3,122.70 × 1,107.40
  4. Step 4: Simplify right side
    2,081.48x = 3,458,077.98
  5. Step 5: Solve for x
    x = 3,458,077.98/2,081.48
  6. Step 6: Final answer
    x = 1,661.36

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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.