Home / 761-813

Finding the Third Proportional to 761 and 813

Calculator

Solution

The third proportional to 761 and 813 is: 868.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    761 : 813 = 813 : x
  2. Step 2: Convert to fraction form
    761/813 = 813/x
  3. Step 3: Cross multiply
    761x = 813 × 813
  4. Step 4: Simplify right side
    761x = 660,969
  5. Step 5: Solve for x
    x = 660,969/761
  6. Step 6: Final answer
    x = 868.55

Related Problems

Find third proportional to 380.50 and 406.50
Half scale
Find third proportional to 1,522 and 1,626
Double scale
Find third proportional to 763 and 815
Similar ratio
Find third proportional to 1,141.50 and 1,219.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.