Home / 3,122.26-4,685.20-1,661.40

Finding the Fourth Proportional to 3,122.26, 4,685.20 and 1,661.40

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Solution

The fourth proportional to 3,122.26, 4,685.20 and 1,661.40 is: 2,493.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.26 : 4,685.20 = 1,661.40 : x
  2. Step 2: Convert to fraction form
    3,122.26/4,685.20 = 1,661.40/x
  3. Step 3: Cross multiply
    3,122.26x = 4,685.20 × 1,661.40
  4. Step 4: Simplify right side
    3,122.26x = 7,783,991.28
  5. Step 5: Solve for x
    x = 7,783,991.28/3,122.26
  6. Step 6: Final answer
    x = 2,493.06

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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.