Home / 3,099.06-4,278.42-1,980.72

Finding the Fourth Proportional to 3,099.06, 4,278.42 and 1,980.72

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Solution

The fourth proportional to 3,099.06, 4,278.42 and 1,980.72 is: 2,734.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.06 : 4,278.42 = 1,980.72 : x
  2. Step 2: Convert to fraction form
    3,099.06/4,278.42 = 1,980.72/x
  3. Step 3: Cross multiply
    3,099.06x = 4,278.42 × 1,980.72
  4. Step 4: Simplify right side
    3,099.06x = 8,474,352.06
  5. Step 5: Solve for x
    x = 8,474,352.06/3,099.06
  6. Step 6: Final answer
    x = 2,734.49

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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.