Home / 2,172.52-3,258.78-1,129.96

Finding the Fourth Proportional to 2,172.52, 3,258.78 and 1,129.96

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Solution

The fourth proportional to 2,172.52, 3,258.78 and 1,129.96 is: 1,694.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.52 : 3,258.78 = 1,129.96 : x
  2. Step 2: Convert to fraction form
    2,172.52/3,258.78 = 1,129.96/x
  3. Step 3: Cross multiply
    2,172.52x = 3,258.78 × 1,129.96
  4. Step 4: Simplify right side
    2,172.52x = 3,682,291.05
  5. Step 5: Solve for x
    x = 3,682,291.05/2,172.52
  6. Step 6: Final answer
    x = 1,694.94

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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.