Home / 128,819-275,328

Finding the Third Proportional to 128,819 and 275,328

Calculator

Solution

The third proportional to 128,819 and 275,328 is: 588,465.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819 : 275,328 = 275,328 : x
  2. Step 2: Convert to fraction form
    128,819/275,328 = 275,328/x
  3. Step 3: Cross multiply
    128,819x = 275,328 × 275,328
  4. Step 4: Simplify right side
    128,819x = 75,805,507,584
  5. Step 5: Solve for x
    x = 75,805,507,584/128,819
  6. Step 6: Final answer
    x = 588,465.27

Related Problems

Find third proportional to 64,409.50 and 137,664
Half scale
Find third proportional to 257,638 and 550,656
Double scale
Find third proportional to 128,821 and 275,332
Similar ratio
Find third proportional to 193,228.50 and 412,992
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.