Home / 1,861.39-2,786.61-1,243.57

Finding the Fourth Proportional to 1,861.39, 2,786.61 and 1,243.57

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Solution

The fourth proportional to 1,861.39, 2,786.61 and 1,243.57 is: 1,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.39 : 2,786.61 = 1,243.57 : x
  2. Step 2: Convert to fraction form
    1,861.39/2,786.61 = 1,243.57/x
  3. Step 3: Cross multiply
    1,861.39x = 2,786.61 × 1,243.57
  4. Step 4: Simplify right side
    1,861.39x = 3,465,344.60
  5. Step 5: Solve for x
    x = 3,465,344.60/1,861.39
  6. Step 6: Final answer
    x = 1,861.70

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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.