Home / 681-768.75

Finding the Third Proportional to 681 and 768.75

Calculator

Solution

The third proportional to 681 and 768.75 is: 867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    681 : 768.75 = 768.75 : x
  2. Step 2: Convert to fraction form
    681/768.75 = 768.75/x
  3. Step 3: Cross multiply
    681x = 768.75 × 768.75
  4. Step 4: Simplify right side
    681x = 590,976.56
  5. Step 5: Solve for x
    x = 590,976.56/681
  6. Step 6: Final answer
    x = 867.81

Related Problems

Find third proportional to 340.50 and 384.38
Half scale
Find third proportional to 1,362 and 1,537.50
Double scale
Find third proportional to 683 and 771
Similar ratio
Find third proportional to 1,021.50 and 1,153.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.