Home / 1,398-3,311

Finding the Third Proportional to 1,398 and 3,311

Calculator

Solution

The third proportional to 1,398 and 3,311 is: 7,841.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398 : 3,311 = 3,311 : x
  2. Step 2: Convert to fraction form
    1,398/3,311 = 3,311/x
  3. Step 3: Cross multiply
    1,398x = 3,311 × 3,311
  4. Step 4: Simplify right side
    1,398x = 10,962,721
  5. Step 5: Solve for x
    x = 10,962,721/1,398
  6. Step 6: Final answer
    x = 7,841.72

Related Problems

Find third proportional to 699 and 1,655.50
Half scale
Find third proportional to 2,796 and 6,622
Double scale
Find third proportional to 1,400 and 3,316
Similar ratio
Find third proportional to 2,097 and 4,966.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.