Home / 291,258-391,465

Finding the Third Proportional to 291,258 and 391,465

Calculator

Solution

The third proportional to 291,258 and 391,465 is: 526,148.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,258 : 391,465 = 391,465 : x
  2. Step 2: Convert to fraction form
    291,258/391,465 = 391,465/x
  3. Step 3: Cross multiply
    291,258x = 391,465 × 391,465
  4. Step 4: Simplify right side
    291,258x = 153,244,846,225
  5. Step 5: Solve for x
    x = 153,244,846,225/291,258
  6. Step 6: Final answer
    x = 526,148.11

Related Problems

Find third proportional to 145,629 and 195,732.50
Half scale
Find third proportional to 582,516 and 782,930
Double scale
Find third proportional to 291,260 and 391,468
Similar ratio
Find third proportional to 436,887 and 587,197.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.