Home / 289,487-628,489

Finding the Third Proportional to 289,487 and 628,489

Calculator

Solution

The third proportional to 289,487 and 628,489 is: 1,364,477.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,487 : 628,489 = 628,489 : x
  2. Step 2: Convert to fraction form
    289,487/628,489 = 628,489/x
  3. Step 3: Cross multiply
    289,487x = 628,489 × 628,489
  4. Step 4: Simplify right side
    289,487x = 394,998,423,121
  5. Step 5: Solve for x
    x = 394,998,423,121/289,487
  6. Step 6: Final answer
    x = 1,364,477.24

Related Problems

Find third proportional to 144,743.50 and 314,244.50
Half scale
Find third proportional to 578,974 and 1,256,978
Double scale
Find third proportional to 289,489 and 628,493
Similar ratio
Find third proportional to 434,230.50 and 942,733.50
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.