Home / 2,120.54-3,179.73-1,428.26

Finding the Fourth Proportional to 2,120.54, 3,179.73 and 1,428.26

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Solution

The fourth proportional to 2,120.54, 3,179.73 and 1,428.26 is: 2,141.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.54 : 3,179.73 = 1,428.26 : x
  2. Step 2: Convert to fraction form
    2,120.54/3,179.73 = 1,428.26/x
  3. Step 3: Cross multiply
    2,120.54x = 3,179.73 × 1,428.26
  4. Step 4: Simplify right side
    2,120.54x = 4,541,481.17
  5. Step 5: Solve for x
    x = 4,541,481.17/2,120.54
  6. Step 6: Final answer
    x = 2,141.66

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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.