Home / 209,026-318,455

Finding the Third Proportional to 209,026 and 318,455

Calculator

Solution

The third proportional to 209,026 and 318,455 is: 485,172.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,026 : 318,455 = 318,455 : x
  2. Step 2: Convert to fraction form
    209,026/318,455 = 318,455/x
  3. Step 3: Cross multiply
    209,026x = 318,455 × 318,455
  4. Step 4: Simplify right side
    209,026x = 101,413,587,025
  5. Step 5: Solve for x
    x = 101,413,587,025/209,026
  6. Step 6: Final answer
    x = 485,172.12

Related Problems

Find third proportional to 104,513 and 159,227.50
Half scale
Find third proportional to 418,052 and 636,910
Double scale
Find third proportional to 209,028 and 318,458
Similar ratio
Find third proportional to 313,539 and 477,682.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.