Home / 809.71-1,289.05

Finding the Third Proportional to 809.71 and 1,289.05

Calculator

Solution

The third proportional to 809.71 and 1,289.05 is: 2,052.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.71 : 1,289.05 = 1,289.05 : x
  2. Step 2: Convert to fraction form
    809.71/1,289.05 = 1,289.05/x
  3. Step 3: Cross multiply
    809.71x = 1,289.05 × 1,289.05
  4. Step 4: Simplify right side
    809.71x = 1,661,659.94
  5. Step 5: Solve for x
    x = 1,661,659.94/809.71
  6. Step 6: Final answer
    x = 2,052.16

Related Problems

Find third proportional to 404.86 and 644.53
Half scale
Find third proportional to 1,619.43 and 2,578.11
Double scale
Find third proportional to 812 and 1,292
Similar ratio
Find third proportional to 1,214.57 and 1,933.58
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.