Home / 213,138-331,155

Finding the Third Proportional to 213,138 and 331,155

Calculator

Solution

The third proportional to 213,138 and 331,155 is: 514,519.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,138 : 331,155 = 331,155 : x
  2. Step 2: Convert to fraction form
    213,138/331,155 = 331,155/x
  3. Step 3: Cross multiply
    213,138x = 331,155 × 331,155
  4. Step 4: Simplify right side
    213,138x = 109,663,634,025
  5. Step 5: Solve for x
    x = 109,663,634,025/213,138
  6. Step 6: Final answer
    x = 514,519.39

Related Problems

Find third proportional to 106,569 and 165,577.50
Half scale
Find third proportional to 426,276 and 662,310
Double scale
Find third proportional to 213,140 and 331,158
Similar ratio
Find third proportional to 319,707 and 496,732.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.