Home / 128,868-276,210

Finding the Third Proportional to 128,868 and 276,210

Calculator

Solution

The third proportional to 128,868 and 276,210 is: 592,016.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,868 : 276,210 = 276,210 : x
  2. Step 2: Convert to fraction form
    128,868/276,210 = 276,210/x
  3. Step 3: Cross multiply
    128,868x = 276,210 × 276,210
  4. Step 4: Simplify right side
    128,868x = 76,291,964,100
  5. Step 5: Solve for x
    x = 76,291,964,100/128,868
  6. Step 6: Final answer
    x = 592,016.36

Related Problems

Find third proportional to 64,434 and 138,105
Half scale
Find third proportional to 257,736 and 552,420
Double scale
Find third proportional to 128,870 and 276,214
Similar ratio
Find third proportional to 193,302 and 414,315
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.