Home / 2,680.92-4,021.32-1,220.46

Finding the Fourth Proportional to 2,680.92, 4,021.32 and 1,220.46

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Solution

The fourth proportional to 2,680.92, 4,021.32 and 1,220.46 is: 1,830.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.92 : 4,021.32 = 1,220.46 : x
  2. Step 2: Convert to fraction form
    2,680.92/4,021.32 = 1,220.46/x
  3. Step 3: Cross multiply
    2,680.92x = 4,021.32 × 1,220.46
  4. Step 4: Simplify right side
    2,680.92x = 4,907,860.21
  5. Step 5: Solve for x
    x = 4,907,860.21/2,680.92
  6. Step 6: Final answer
    x = 1,830.66

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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.