Home / 909-1,065

Finding the Third Proportional to 909 and 1,065

Calculator

Solution

The third proportional to 909 and 1,065 is: 1,247.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    909 : 1,065 = 1,065 : x
  2. Step 2: Convert to fraction form
    909/1,065 = 1,065/x
  3. Step 3: Cross multiply
    909x = 1,065 × 1,065
  4. Step 4: Simplify right side
    909x = 1,134,225
  5. Step 5: Solve for x
    x = 1,134,225/909
  6. Step 6: Final answer
    x = 1,247.77

Related Problems

Find third proportional to 454.50 and 532.50
Half scale
Find third proportional to 1,818 and 2,130
Double scale
Find third proportional to 911 and 1,067
Similar ratio
Find third proportional to 1,363.50 and 1,597.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.