Home / 200,268-279,990

Finding the Third Proportional to 200,268 and 279,990

Calculator

Solution

The third proportional to 200,268 and 279,990 is: 391,447.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,268 : 279,990 = 279,990 : x
  2. Step 2: Convert to fraction form
    200,268/279,990 = 279,990/x
  3. Step 3: Cross multiply
    200,268x = 279,990 × 279,990
  4. Step 4: Simplify right side
    200,268x = 78,394,400,100
  5. Step 5: Solve for x
    x = 78,394,400,100/200,268
  6. Step 6: Final answer
    x = 391,447.46

Related Problems

Find third proportional to 100,134 and 139,995
Half scale
Find third proportional to 400,536 and 559,980
Double scale
Find third proportional to 200,270 and 279,993
Similar ratio
Find third proportional to 300,402 and 419,985
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.