Home / 218,122-319,991

Finding the Third Proportional to 218,122 and 319,991

Calculator

Solution

The third proportional to 218,122 and 319,991 is: 469,435.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,122 : 319,991 = 319,991 : x
  2. Step 2: Convert to fraction form
    218,122/319,991 = 319,991/x
  3. Step 3: Cross multiply
    218,122x = 319,991 × 319,991
  4. Step 4: Simplify right side
    218,122x = 102,394,240,081
  5. Step 5: Solve for x
    x = 102,394,240,081/218,122
  6. Step 6: Final answer
    x = 469,435.64

Related Problems

Find third proportional to 109,061 and 159,995.50
Half scale
Find third proportional to 436,244 and 639,982
Double scale
Find third proportional to 218,124 and 319,994
Similar ratio
Find third proportional to 327,183 and 479,986.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.