Home / 2,845.90-3,930.87-2,190.70

Finding the Fourth Proportional to 2,845.90, 3,930.87 and 2,190.70

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Solution

The fourth proportional to 2,845.90, 3,930.87 and 2,190.70 is: 3,025.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,845.90 : 3,930.87 = 2,190.70 : x
  2. Step 2: Convert to fraction form
    2,845.90/3,930.87 = 2,190.70/x
  3. Step 3: Cross multiply
    2,845.90x = 3,930.87 × 2,190.70
  4. Step 4: Simplify right side
    2,845.90x = 8,611,356.91
  5. Step 5: Solve for x
    x = 8,611,356.91/2,845.90
  6. Step 6: Final answer
    x = 3,025.88

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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.