Home / 3,115.40-4,299.99-1,998.98

Finding the Fourth Proportional to 3,115.40, 4,299.99 and 1,998.98

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Solution

The fourth proportional to 3,115.40, 4,299.99 and 1,998.98 is: 2,759.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.40 : 4,299.99 = 1,998.98 : x
  2. Step 2: Convert to fraction form
    3,115.40/4,299.99 = 1,998.98/x
  3. Step 3: Cross multiply
    3,115.40x = 4,299.99 × 1,998.98
  4. Step 4: Simplify right side
    3,115.40x = 8,595,581.14
  5. Step 5: Solve for x
    x = 8,595,581.14/3,115.40
  6. Step 6: Final answer
    x = 2,759.07

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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.