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Finding the Fourth Proportional to 2,682.96, 4,018.90 and 1,990.41

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Solution

The fourth proportional to 2,682.96, 4,018.90 and 1,990.41 is: 2,981.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,682.96 : 4,018.90 = 1,990.41 : x
  2. Step 2: Convert to fraction form
    2,682.96/4,018.90 = 1,990.41/x
  3. Step 3: Cross multiply
    2,682.96x = 4,018.90 × 1,990.41
  4. Step 4: Simplify right side
    2,682.96x = 7,999,258.75
  5. Step 5: Solve for x
    x = 7,999,258.75/2,682.96
  6. Step 6: Final answer
    x = 2,981.51

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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.