Home / 860-1,288

Finding the Third Proportional to 860 and 1,288

Calculator

Solution

The third proportional to 860 and 1,288 is: 1,929.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    860 : 1,288 = 1,288 : x
  2. Step 2: Convert to fraction form
    860/1,288 = 1,288/x
  3. Step 3: Cross multiply
    860x = 1,288 × 1,288
  4. Step 4: Simplify right side
    860x = 1,658,944
  5. Step 5: Solve for x
    x = 1,658,944/860
  6. Step 6: Final answer
    x = 1,929.00

Related Problems

Find third proportional to 430 and 644
Half scale
Find third proportional to 1,720 and 2,576
Double scale
Find third proportional to 862 and 1,291
Similar ratio
Find third proportional to 1,290 and 1,932
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.