Home / 419-545

Finding the Third Proportional to 419 and 545

Calculator

Solution

The third proportional to 419 and 545 is: 708.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    419 : 545 = 545 : x
  2. Step 2: Convert to fraction form
    419/545 = 545/x
  3. Step 3: Cross multiply
    419x = 545 × 545
  4. Step 4: Simplify right side
    419x = 297,025
  5. Step 5: Solve for x
    x = 297,025/419
  6. Step 6: Final answer
    x = 708.89

Related Problems

Find third proportional to 209.50 and 272.50
Half scale
Find third proportional to 838 and 1,090
Double scale
Find third proportional to 421 and 548
Similar ratio
Find third proportional to 628.50 and 817.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.