Home / 309,997-438,766

Finding the Third Proportional to 309,997 and 438,766

Calculator

Solution

The third proportional to 309,997 and 438,766 is: 621,024.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,997 : 438,766 = 438,766 : x
  2. Step 2: Convert to fraction form
    309,997/438,766 = 438,766/x
  3. Step 3: Cross multiply
    309,997x = 438,766 × 438,766
  4. Step 4: Simplify right side
    309,997x = 192,515,602,756
  5. Step 5: Solve for x
    x = 192,515,602,756/309,997
  6. Step 6: Final answer
    x = 621,024.08

Related Problems

Find third proportional to 154,998.50 and 219,383
Half scale
Find third proportional to 619,994 and 877,532
Double scale
Find third proportional to 309,999 and 438,769
Similar ratio
Find third proportional to 464,995.50 and 658,149
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.