Home / 2,120.92-3,182.74-1,147.72

Finding the Fourth Proportional to 2,120.92, 3,182.74 and 1,147.72

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Solution

The fourth proportional to 2,120.92, 3,182.74 and 1,147.72 is: 1,722.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.92 : 3,182.74 = 1,147.72 : x
  2. Step 2: Convert to fraction form
    2,120.92/3,182.74 = 1,147.72/x
  3. Step 3: Cross multiply
    2,120.92x = 3,182.74 × 1,147.72
  4. Step 4: Simplify right side
    2,120.92x = 3,652,894.35
  5. Step 5: Solve for x
    x = 3,652,894.35/2,120.92
  6. Step 6: Final answer
    x = 1,722.32

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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.