Home / 766-1,389

Finding the Third Proportional to 766 and 1,389

Calculator

Solution

The third proportional to 766 and 1,389 is: 2,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    766 : 1,389 = 1,389 : x
  2. Step 2: Convert to fraction form
    766/1,389 = 1,389/x
  3. Step 3: Cross multiply
    766x = 1,389 × 1,389
  4. Step 4: Simplify right side
    766x = 1,929,321
  5. Step 5: Solve for x
    x = 1,929,321/766
  6. Step 6: Final answer
    x = 2,518.70

Related Problems

Find third proportional to 383 and 694.50
Half scale
Find third proportional to 1,532 and 2,778
Double scale
Find third proportional to 768 and 1,393
Similar ratio
Find third proportional to 1,149 and 2,083.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.