Home / 128,964-289,672

Finding the Third Proportional to 128,964 and 289,672

Calculator

Solution

The third proportional to 128,964 and 289,672 is: 650,645.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,964 : 289,672 = 289,672 : x
  2. Step 2: Convert to fraction form
    128,964/289,672 = 289,672/x
  3. Step 3: Cross multiply
    128,964x = 289,672 × 289,672
  4. Step 4: Simplify right side
    128,964x = 83,909,867,584
  5. Step 5: Solve for x
    x = 83,909,867,584/128,964
  6. Step 6: Final answer
    x = 650,645.67

Related Problems

Find third proportional to 64,482 and 144,836
Half scale
Find third proportional to 257,928 and 579,344
Double scale
Find third proportional to 128,966 and 289,676
Similar ratio
Find third proportional to 193,446 and 434,508
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.