Home / 318,258-691,731

Finding the Third Proportional to 318,258 and 691,731

Calculator

Solution

The third proportional to 318,258 and 691,731 is: 1,503,471.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,258 : 691,731 = 691,731 : x
  2. Step 2: Convert to fraction form
    318,258/691,731 = 691,731/x
  3. Step 3: Cross multiply
    318,258x = 691,731 × 691,731
  4. Step 4: Simplify right side
    318,258x = 478,491,776,361
  5. Step 5: Solve for x
    x = 478,491,776,361/318,258
  6. Step 6: Final answer
    x = 1,503,471.32

Related Problems

Find third proportional to 159,129 and 345,865.50
Half scale
Find third proportional to 636,516 and 1,383,462
Double scale
Find third proportional to 318,260 and 691,735
Similar ratio
Find third proportional to 477,387 and 1,037,596.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.