Home / 321.79-455.63

Finding the Third Proportional to 321.79 and 455.63

Calculator

Solution

The third proportional to 321.79 and 455.63 is: 645.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.79 : 455.63 = 455.63 : x
  2. Step 2: Convert to fraction form
    321.79/455.63 = 455.63/x
  3. Step 3: Cross multiply
    321.79x = 455.63 × 455.63
  4. Step 4: Simplify right side
    321.79x = 207,594.14
  5. Step 5: Solve for x
    x = 207,594.14/321.79
  6. Step 6: Final answer
    x = 645.13

Related Problems

Find third proportional to 160.89 and 227.81
Half scale
Find third proportional to 643.57 and 911.25
Double scale
Find third proportional to 324 and 458
Similar ratio
Find third proportional to 482.68 and 683.44
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.