Home / 3,120.65-4,691.45-2,202.78

Finding the Fourth Proportional to 3,120.65, 4,691.45 and 2,202.78

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Solution

The fourth proportional to 3,120.65, 4,691.45 and 2,202.78 is: 3,311.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.65 : 4,691.45 = 2,202.78 : x
  2. Step 2: Convert to fraction form
    3,120.65/4,691.45 = 2,202.78/x
  3. Step 3: Cross multiply
    3,120.65x = 4,691.45 × 2,202.78
  4. Step 4: Simplify right side
    3,120.65x = 10,334,232.23
  5. Step 5: Solve for x
    x = 10,334,232.23/3,120.65
  6. Step 6: Final answer
    x = 3,311.56

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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.