Home / 909-1,053

Finding the Third Proportional to 909 and 1,053

Calculator

Solution

The third proportional to 909 and 1,053 is: 1,219.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    909 : 1,053 = 1,053 : x
  2. Step 2: Convert to fraction form
    909/1,053 = 1,053/x
  3. Step 3: Cross multiply
    909x = 1,053 × 1,053
  4. Step 4: Simplify right side
    909x = 1,108,809
  5. Step 5: Solve for x
    x = 1,108,809/909
  6. Step 6: Final answer
    x = 1,219.81

Related Problems

Find third proportional to 454.50 and 526.50
Half scale
Find third proportional to 1,818 and 2,106
Double scale
Find third proportional to 911 and 1,055
Similar ratio
Find third proportional to 1,363.50 and 1,579.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.