Home / 816-1,317

Finding the Third Proportional to 816 and 1,317

Calculator

Solution

The third proportional to 816 and 1,317 is: 2,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    816 : 1,317 = 1,317 : x
  2. Step 2: Convert to fraction form
    816/1,317 = 1,317/x
  3. Step 3: Cross multiply
    816x = 1,317 × 1,317
  4. Step 4: Simplify right side
    816x = 1,734,489
  5. Step 5: Solve for x
    x = 1,734,489/816
  6. Step 6: Final answer
    x = 2,125.60

Related Problems

Find third proportional to 408 and 658.50
Half scale
Find third proportional to 1,632 and 2,634
Double scale
Find third proportional to 818 and 1,320
Similar ratio
Find third proportional to 1,224 and 1,975.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.