Home / 275,508-421,418

Finding the Third Proportional to 275,508 and 421,418

Calculator

Solution

The third proportional to 275,508 and 421,418 is: 644,602.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,508 : 421,418 = 421,418 : x
  2. Step 2: Convert to fraction form
    275,508/421,418 = 421,418/x
  3. Step 3: Cross multiply
    275,508x = 421,418 × 421,418
  4. Step 4: Simplify right side
    275,508x = 177,593,130,724
  5. Step 5: Solve for x
    x = 177,593,130,724/275,508
  6. Step 6: Final answer
    x = 644,602.45

Related Problems

Find third proportional to 137,754 and 210,709
Half scale
Find third proportional to 551,016 and 842,836
Double scale
Find third proportional to 275,510 and 421,421
Similar ratio
Find third proportional to 413,262 and 632,127
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.