Home / 3,121.15-4,307.19-1,704.85

Finding the Fourth Proportional to 3,121.15, 4,307.19 and 1,704.85

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Solution

The fourth proportional to 3,121.15, 4,307.19 and 1,704.85 is: 2,352.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.15 : 4,307.19 = 1,704.85 : x
  2. Step 2: Convert to fraction form
    3,121.15/4,307.19 = 1,704.85/x
  3. Step 3: Cross multiply
    3,121.15x = 4,307.19 × 1,704.85
  4. Step 4: Simplify right side
    3,121.15x = 7,343,112.87
  5. Step 5: Solve for x
    x = 7,343,112.87/3,121.15
  6. Step 6: Final answer
    x = 2,352.69

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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.