Home / 120,915-251,639

Finding the Third Proportional to 120,915 and 251,639

Calculator

Solution

The third proportional to 120,915 and 251,639 is: 523,691.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915 : 251,639 = 251,639 : x
  2. Step 2: Convert to fraction form
    120,915/251,639 = 251,639/x
  3. Step 3: Cross multiply
    120,915x = 251,639 × 251,639
  4. Step 4: Simplify right side
    120,915x = 63,322,186,321
  5. Step 5: Solve for x
    x = 63,322,186,321/120,915
  6. Step 6: Final answer
    x = 523,691.74

Related Problems

Find third proportional to 60,457.50 and 125,819.50
Half scale
Find third proportional to 241,830 and 503,278
Double scale
Find third proportional to 120,917 and 251,643
Similar ratio
Find third proportional to 181,372.50 and 377,458.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.