Home / 218,826-312,912

Finding the Third Proportional to 218,826 and 312,912

Calculator

Solution

The third proportional to 218,826 and 312,912 is: 447,451.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,826 : 312,912 = 312,912 : x
  2. Step 2: Convert to fraction form
    218,826/312,912 = 312,912/x
  3. Step 3: Cross multiply
    218,826x = 312,912 × 312,912
  4. Step 4: Simplify right side
    218,826x = 97,913,919,744
  5. Step 5: Solve for x
    x = 97,913,919,744/218,826
  6. Step 6: Final answer
    x = 447,451.03

Related Problems

Find third proportional to 109,413 and 156,456
Half scale
Find third proportional to 437,652 and 625,824
Double scale
Find third proportional to 218,828 and 312,915
Similar ratio
Find third proportional to 328,239 and 469,368
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.