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Finding the Fourth Proportional to 1,661.41, 2,286.39 and 1,286.92

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Solution

The fourth proportional to 1,661.41, 2,286.39 and 1,286.92 is: 1,771.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.41 : 2,286.39 = 1,286.92 : x
  2. Step 2: Convert to fraction form
    1,661.41/2,286.39 = 1,286.92/x
  3. Step 3: Cross multiply
    1,661.41x = 2,286.39 × 1,286.92
  4. Step 4: Simplify right side
    1,661.41x = 2,942,401.02
  5. Step 5: Solve for x
    x = 2,942,401.02/1,661.41
  6. Step 6: Final answer
    x = 1,771.03

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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.