Home / 2,120.45-3,174.26-1,143.59

Finding the Fourth Proportional to 2,120.45, 3,174.26 and 1,143.59

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Solution

The fourth proportional to 2,120.45, 3,174.26 and 1,143.59 is: 1,711.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.45 : 3,174.26 = 1,143.59 : x
  2. Step 2: Convert to fraction form
    2,120.45/3,174.26 = 1,143.59/x
  3. Step 3: Cross multiply
    2,120.45x = 3,174.26 × 1,143.59
  4. Step 4: Simplify right side
    2,120.45x = 3,630,030.40
  5. Step 5: Solve for x
    x = 3,630,030.40/2,120.45
  6. Step 6: Final answer
    x = 1,711.92

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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.