Home / 1,278-1,918

Finding the Third Proportional to 1,278 and 1,918

Calculator

Solution

The third proportional to 1,278 and 1,918 is: 2,878.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278 : 1,918 = 1,918 : x
  2. Step 2: Convert to fraction form
    1,278/1,918 = 1,918/x
  3. Step 3: Cross multiply
    1,278x = 1,918 × 1,918
  4. Step 4: Simplify right side
    1,278x = 3,678,724
  5. Step 5: Solve for x
    x = 3,678,724/1,278
  6. Step 6: Final answer
    x = 2,878.50

Related Problems

Find third proportional to 639 and 959
Half scale
Find third proportional to 2,556 and 3,836
Double scale
Find third proportional to 1,280 and 1,921
Similar ratio
Find third proportional to 1,917 and 2,877
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.