Home / 3,783.20-5,220.88-2,290.80

Finding the Fourth Proportional to 3,783.20, 5,220.88 and 2,290.80

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Solution

The fourth proportional to 3,783.20, 5,220.88 and 2,290.80 is: 3,161.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,783.20 : 5,220.88 = 2,290.80 : x
  2. Step 2: Convert to fraction form
    3,783.20/5,220.88 = 2,290.80/x
  3. Step 3: Cross multiply
    3,783.20x = 5,220.88 × 2,290.80
  4. Step 4: Simplify right side
    3,783.20x = 11,959,991.90
  5. Step 5: Solve for x
    x = 11,959,991.90/3,783.20
  6. Step 6: Final answer
    x = 3,161.34

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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.