Home / 428,220-922,212

Finding the Third Proportional to 428,220 and 922,212

Calculator

Solution

The third proportional to 428,220 and 922,212 is: 1,986,070.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,220 : 922,212 = 922,212 : x
  2. Step 2: Convert to fraction form
    428,220/922,212 = 922,212/x
  3. Step 3: Cross multiply
    428,220x = 922,212 × 922,212
  4. Step 4: Simplify right side
    428,220x = 850,474,972,944
  5. Step 5: Solve for x
    x = 850,474,972,944/428,220
  6. Step 6: Final answer
    x = 1,986,070.18

Related Problems

Find third proportional to 214,110 and 461,106
Half scale
Find third proportional to 856,440 and 1,844,424
Double scale
Find third proportional to 428,222 and 922,216
Similar ratio
Find third proportional to 642,330 and 1,383,318
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.