Home / 991-2,131

Finding the Third Proportional to 991 and 2,131

Calculator

Solution

The third proportional to 991 and 2,131 is: 4,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    991 : 2,131 = 2,131 : x
  2. Step 2: Convert to fraction form
    991/2,131 = 2,131/x
  3. Step 3: Cross multiply
    991x = 2,131 × 2,131
  4. Step 4: Simplify right side
    991x = 4,541,161
  5. Step 5: Solve for x
    x = 4,541,161/991
  6. Step 6: Final answer
    x = 4,582.40

Related Problems

Find third proportional to 495.50 and 1,065.50
Half scale
Find third proportional to 1,982 and 4,262
Double scale
Find third proportional to 993 and 2,135
Similar ratio
Find third proportional to 1,486.50 and 3,196.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.