Home / 242,112-400,128

Finding the Third Proportional to 242,112 and 400,128

Calculator

Solution

The third proportional to 242,112 and 400,128 is: 661,274.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,112 : 400,128 = 400,128 : x
  2. Step 2: Convert to fraction form
    242,112/400,128 = 400,128/x
  3. Step 3: Cross multiply
    242,112x = 400,128 × 400,128
  4. Step 4: Simplify right side
    242,112x = 160,102,416,384
  5. Step 5: Solve for x
    x = 160,102,416,384/242,112
  6. Step 6: Final answer
    x = 661,274.19

Related Problems

Find third proportional to 121,056 and 200,064
Half scale
Find third proportional to 484,224 and 800,256
Double scale
Find third proportional to 242,114 and 400,131
Similar ratio
Find third proportional to 363,168 and 600,192
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.