Home / 2,389.46-3,591.51-1,981.22

Finding the Fourth Proportional to 2,389.46, 3,591.51 and 1,981.22

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Solution

The fourth proportional to 2,389.46, 3,591.51 and 1,981.22 is: 2,977.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.46 : 3,591.51 = 1,981.22 : x
  2. Step 2: Convert to fraction form
    2,389.46/3,591.51 = 1,981.22/x
  3. Step 3: Cross multiply
    2,389.46x = 3,591.51 × 1,981.22
  4. Step 4: Simplify right side
    2,389.46x = 7,115,571.44
  5. Step 5: Solve for x
    x = 7,115,571.44/2,389.46
  6. Step 6: Final answer
    x = 2,977.90

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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.