Home / 3,121.58-4,680.61-1,040.47

Finding the Fourth Proportional to 3,121.58, 4,680.61 and 1,040.47

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Solution

The fourth proportional to 3,121.58, 4,680.61 and 1,040.47 is: 1,560.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.58 : 4,680.61 = 1,040.47 : x
  2. Step 2: Convert to fraction form
    3,121.58/4,680.61 = 1,040.47/x
  3. Step 3: Cross multiply
    3,121.58x = 4,680.61 × 1,040.47
  4. Step 4: Simplify right side
    3,121.58x = 4,870,019.98
  5. Step 5: Solve for x
    x = 4,870,019.98/3,121.58
  6. Step 6: Final answer
    x = 1,560.11

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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.