Home / 1,287-2,943

Finding the Third Proportional to 1,287 and 2,943

Calculator

Solution

The third proportional to 1,287 and 2,943 is: 6,729.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287 : 2,943 = 2,943 : x
  2. Step 2: Convert to fraction form
    1,287/2,943 = 2,943/x
  3. Step 3: Cross multiply
    1,287x = 2,943 × 2,943
  4. Step 4: Simplify right side
    1,287x = 8,661,249
  5. Step 5: Solve for x
    x = 8,661,249/1,287
  6. Step 6: Final answer
    x = 6,729.80

Related Problems

Find third proportional to 643.50 and 1,471.50
Half scale
Find third proportional to 2,574 and 5,886
Double scale
Find third proportional to 1,289 and 2,948
Similar ratio
Find third proportional to 1,930.50 and 4,414.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.