Home / 3,120.09-4,306.26-1,861.22

Finding the Fourth Proportional to 3,120.09, 4,306.26 and 1,861.22

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Solution

The fourth proportional to 3,120.09, 4,306.26 and 1,861.22 is: 2,568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.09 : 4,306.26 = 1,861.22 : x
  2. Step 2: Convert to fraction form
    3,120.09/4,306.26 = 1,861.22/x
  3. Step 3: Cross multiply
    3,120.09x = 4,306.26 × 1,861.22
  4. Step 4: Simplify right side
    3,120.09x = 8,014,914.98
  5. Step 5: Solve for x
    x = 8,014,914.98/3,120.09
  6. Step 6: Final answer
    x = 2,568.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.