Home / 421,552-642,836

Finding the Third Proportional to 421,552 and 642,836

Calculator

Solution

The third proportional to 421,552 and 642,836 is: 980,277.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,552 : 642,836 = 642,836 : x
  2. Step 2: Convert to fraction form
    421,552/642,836 = 642,836/x
  3. Step 3: Cross multiply
    421,552x = 642,836 × 642,836
  4. Step 4: Simplify right side
    421,552x = 413,238,122,896
  5. Step 5: Solve for x
    x = 413,238,122,896/421,552
  6. Step 6: Final answer
    x = 980,277.93

Related Problems

Find third proportional to 210,776 and 321,418
Half scale
Find third proportional to 843,104 and 1,285,672
Double scale
Find third proportional to 421,554 and 642,839
Similar ratio
Find third proportional to 632,328 and 964,254
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.