Home / 423,874-640,131

Finding the Third Proportional to 423,874 and 640,131

Calculator

Solution

The third proportional to 423,874 and 640,131 is: 966,720.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,874 : 640,131 = 640,131 : x
  2. Step 2: Convert to fraction form
    423,874/640,131 = 640,131/x
  3. Step 3: Cross multiply
    423,874x = 640,131 × 640,131
  4. Step 4: Simplify right side
    423,874x = 409,767,697,161
  5. Step 5: Solve for x
    x = 409,767,697,161/423,874
  6. Step 6: Final answer
    x = 966,720.53

Related Problems

Find third proportional to 211,937 and 320,065.50
Half scale
Find third proportional to 847,748 and 1,280,262
Double scale
Find third proportional to 423,876 and 640,134
Similar ratio
Find third proportional to 635,811 and 960,196.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.