Home / 3,121.26-4,681.68-1,661.23

Finding the Fourth Proportional to 3,121.26, 4,681.68 and 1,661.23

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Solution

The fourth proportional to 3,121.26, 4,681.68 and 1,661.23 is: 2,491.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.26 : 4,681.68 = 1,661.23 : x
  2. Step 2: Convert to fraction form
    3,121.26/4,681.68 = 1,661.23/x
  3. Step 3: Cross multiply
    3,121.26x = 4,681.68 × 1,661.23
  4. Step 4: Simplify right side
    3,121.26x = 7,777,347.27
  5. Step 5: Solve for x
    x = 7,777,347.27/3,121.26
  6. Step 6: Final answer
    x = 2,491.73

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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.