Home / 453-545

Finding the Third Proportional to 453 and 545

Calculator

Solution

The third proportional to 453 and 545 is: 655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    453 : 545 = 545 : x
  2. Step 2: Convert to fraction form
    453/545 = 545/x
  3. Step 3: Cross multiply
    453x = 545 × 545
  4. Step 4: Simplify right side
    453x = 297,025
  5. Step 5: Solve for x
    x = 297,025/453
  6. Step 6: Final answer
    x = 655.68

Related Problems

Find third proportional to 226.50 and 272.50
Half scale
Find third proportional to 906 and 1,090
Double scale
Find third proportional to 455 and 547
Similar ratio
Find third proportional to 679.50 and 817.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.