Home / 290,828-434,505

Finding the Third Proportional to 290,828 and 434,505

Calculator

Solution

The third proportional to 290,828 and 434,505 is: 649,162.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,828 : 434,505 = 434,505 : x
  2. Step 2: Convert to fraction form
    290,828/434,505 = 434,505/x
  3. Step 3: Cross multiply
    290,828x = 434,505 × 434,505
  4. Step 4: Simplify right side
    290,828x = 188,794,595,025
  5. Step 5: Solve for x
    x = 188,794,595,025/290,828
  6. Step 6: Final answer
    x = 649,162.37

Related Problems

Find third proportional to 145,414 and 217,252.50
Half scale
Find third proportional to 581,656 and 869,010
Double scale
Find third proportional to 290,830 and 434,508
Similar ratio
Find third proportional to 436,242 and 651,757.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.