Home / 321,171-691,671

Finding the Third Proportional to 321,171 and 691,671

Calculator

Solution

The third proportional to 321,171 and 691,671 is: 1,489,576.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,171 : 691,671 = 691,671 : x
  2. Step 2: Convert to fraction form
    321,171/691,671 = 691,671/x
  3. Step 3: Cross multiply
    321,171x = 691,671 × 691,671
  4. Step 4: Simplify right side
    321,171x = 478,408,772,241
  5. Step 5: Solve for x
    x = 478,408,772,241/321,171
  6. Step 6: Final answer
    x = 1,489,576.49

Related Problems

Find third proportional to 160,585.50 and 345,835.50
Half scale
Find third proportional to 642,342 and 1,383,342
Double scale
Find third proportional to 321,173 and 691,675
Similar ratio
Find third proportional to 481,756.50 and 1,037,506.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.