Home / 3,480.40-5,220.60-2,378.80

Finding the Fourth Proportional to 3,480.40, 5,220.60 and 2,378.80

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Solution

The fourth proportional to 3,480.40, 5,220.60 and 2,378.80 is: 3,568.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.40 : 5,220.60 = 2,378.80 : x
  2. Step 2: Convert to fraction form
    3,480.40/5,220.60 = 2,378.80/x
  3. Step 3: Cross multiply
    3,480.40x = 5,220.60 × 2,378.80
  4. Step 4: Simplify right side
    3,480.40x = 12,418,763.28
  5. Step 5: Solve for x
    x = 12,418,763.28/3,480.40
  6. Step 6: Final answer
    x = 3,568.20

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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.