Home / 311,679-415,962

Finding the Third Proportional to 311,679 and 415,962

Calculator

Solution

The third proportional to 311,679 and 415,962 is: 555,136.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,679 : 415,962 = 415,962 : x
  2. Step 2: Convert to fraction form
    311,679/415,962 = 415,962/x
  3. Step 3: Cross multiply
    311,679x = 415,962 × 415,962
  4. Step 4: Simplify right side
    311,679x = 173,024,385,444
  5. Step 5: Solve for x
    x = 173,024,385,444/311,679
  6. Step 6: Final answer
    x = 555,136.49

Related Problems

Find third proportional to 155,839.50 and 207,981
Half scale
Find third proportional to 623,358 and 831,924
Double scale
Find third proportional to 311,681 and 415,965
Similar ratio
Find third proportional to 467,518.50 and 623,943
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.