Home / 985.75-1,380.75

Finding the Third Proportional to 985.75 and 1,380.75

Calculator

Solution

The third proportional to 985.75 and 1,380.75 is: 1,934.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.75 : 1,380.75 = 1,380.75 : x
  2. Step 2: Convert to fraction form
    985.75/1,380.75 = 1,380.75/x
  3. Step 3: Cross multiply
    985.75x = 1,380.75 × 1,380.75
  4. Step 4: Simplify right side
    985.75x = 1,906,470.56
  5. Step 5: Solve for x
    x = 1,906,470.56/985.75
  6. Step 6: Final answer
    x = 1,934.03

Related Problems

Find third proportional to 492.88 and 690.38
Half scale
Find third proportional to 1,971.50 and 2,761.50
Double scale
Find third proportional to 988 and 1,384
Similar ratio
Find third proportional to 1,478.63 and 2,071.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.