Home / 199,636-428,480

Finding the Third Proportional to 199,636 and 428,480

Calculator

Solution

The third proportional to 199,636 and 428,480 is: 919,649.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,636 : 428,480 = 428,480 : x
  2. Step 2: Convert to fraction form
    199,636/428,480 = 428,480/x
  3. Step 3: Cross multiply
    199,636x = 428,480 × 428,480
  4. Step 4: Simplify right side
    199,636x = 183,595,110,400
  5. Step 5: Solve for x
    x = 183,595,110,400/199,636
  6. Step 6: Final answer
    x = 919,649.31

Related Problems

Find third proportional to 99,818 and 214,240
Half scale
Find third proportional to 399,272 and 856,960
Double scale
Find third proportional to 199,638 and 428,484
Similar ratio
Find third proportional to 299,454 and 642,720
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.