Home / 901-1,389

Finding the Third Proportional to 901 and 1,389

Calculator

Solution

The third proportional to 901 and 1,389 is: 2,141.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    901 : 1,389 = 1,389 : x
  2. Step 2: Convert to fraction form
    901/1,389 = 1,389/x
  3. Step 3: Cross multiply
    901x = 1,389 × 1,389
  4. Step 4: Simplify right side
    901x = 1,929,321
  5. Step 5: Solve for x
    x = 1,929,321/901
  6. Step 6: Final answer
    x = 2,141.31

Related Problems

Find third proportional to 450.50 and 694.50
Half scale
Find third proportional to 1,802 and 2,778
Double scale
Find third proportional to 903 and 1,392
Similar ratio
Find third proportional to 1,351.50 and 2,083.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.