Home / 2,680.30-4,021.80-1,220.41

Finding the Fourth Proportional to 2,680.30, 4,021.80 and 1,220.41

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Solution

The fourth proportional to 2,680.30, 4,021.80 and 1,220.41 is: 1,831.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.30 : 4,021.80 = 1,220.41 : x
  2. Step 2: Convert to fraction form
    2,680.30/4,021.80 = 1,220.41/x
  3. Step 3: Cross multiply
    2,680.30x = 4,021.80 × 1,220.41
  4. Step 4: Simplify right side
    2,680.30x = 4,908,244.94
  5. Step 5: Solve for x
    x = 4,908,244.94/2,680.30
  6. Step 6: Final answer
    x = 1,831.23

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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.