Home / 312,821-687,850

Finding the Third Proportional to 312,821 and 687,850

Calculator

Solution

The third proportional to 312,821 and 687,850 is: 1,512,486.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,821 : 687,850 = 687,850 : x
  2. Step 2: Convert to fraction form
    312,821/687,850 = 687,850/x
  3. Step 3: Cross multiply
    312,821x = 687,850 × 687,850
  4. Step 4: Simplify right side
    312,821x = 473,137,622,500
  5. Step 5: Solve for x
    x = 473,137,622,500/312,821
  6. Step 6: Final answer
    x = 1,512,486.77

Related Problems

Find third proportional to 156,410.50 and 343,925
Half scale
Find third proportional to 625,642 and 1,375,700
Double scale
Find third proportional to 312,823 and 687,854
Similar ratio
Find third proportional to 469,231.50 and 1,031,775
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.