Home / 3,780.80-5,217.20-2,208.72

Finding the Fourth Proportional to 3,780.80, 5,217.20 and 2,208.72

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Solution

The fourth proportional to 3,780.80, 5,217.20 and 2,208.72 is: 3,047.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.80 : 5,217.20 = 2,208.72 : x
  2. Step 2: Convert to fraction form
    3,780.80/5,217.20 = 2,208.72/x
  3. Step 3: Cross multiply
    3,780.80x = 5,217.20 × 2,208.72
  4. Step 4: Simplify right side
    3,780.80x = 11,523,333.98
  5. Step 5: Solve for x
    x = 11,523,333.98/3,780.80
  6. Step 6: Final answer
    x = 3,047.86

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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.