Home / 2,120.37-3,180.57-659.55

Finding the Fourth Proportional to 2,120.37, 3,180.57 and 659.55

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Solution

The fourth proportional to 2,120.37, 3,180.57 and 659.55 is: 989.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.37 : 3,180.57 = 659.55 : x
  2. Step 2: Convert to fraction form
    2,120.37/3,180.57 = 659.55/x
  3. Step 3: Cross multiply
    2,120.37x = 3,180.57 × 659.55
  4. Step 4: Simplify right side
    2,120.37x = 2,097,744.94
  5. Step 5: Solve for x
    x = 2,097,744.94/2,120.37
  6. Step 6: Final answer
    x = 989.33

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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.