Home / 2,745.09-4,118.14-990.12

Finding the Fourth Proportional to 2,745.09, 4,118.14 and 990.12

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Solution

The fourth proportional to 2,745.09, 4,118.14 and 990.12 is: 1,485.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,745.09 : 4,118.14 = 990.12 : x
  2. Step 2: Convert to fraction form
    2,745.09/4,118.14 = 990.12/x
  3. Step 3: Cross multiply
    2,745.09x = 4,118.14 × 990.12
  4. Step 4: Simplify right side
    2,745.09x = 4,077,469.46
  5. Step 5: Solve for x
    x = 4,077,469.46/2,745.09
  6. Step 6: Final answer
    x = 1,485.37

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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.