Home / 321,486-687,261

Finding the Third Proportional to 321,486 and 687,261

Calculator

Solution

The third proportional to 321,486 and 687,261 is: 1,469,201.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,486 : 687,261 = 687,261 : x
  2. Step 2: Convert to fraction form
    321,486/687,261 = 687,261/x
  3. Step 3: Cross multiply
    321,486x = 687,261 × 687,261
  4. Step 4: Simplify right side
    321,486x = 472,327,682,121
  5. Step 5: Solve for x
    x = 472,327,682,121/321,486
  6. Step 6: Final answer
    x = 1,469,201.40

Related Problems

Find third proportional to 160,743 and 343,630.50
Half scale
Find third proportional to 642,972 and 1,374,522
Double scale
Find third proportional to 321,488 and 687,265
Similar ratio
Find third proportional to 482,229 and 1,030,891.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.