Home / 363-515

Finding the Third Proportional to 363 and 515

Calculator

Solution

The third proportional to 363 and 515 is: 730.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    363 : 515 = 515 : x
  2. Step 2: Convert to fraction form
    363/515 = 515/x
  3. Step 3: Cross multiply
    363x = 515 × 515
  4. Step 4: Simplify right side
    363x = 265,225
  5. Step 5: Solve for x
    x = 265,225/363
  6. Step 6: Final answer
    x = 730.65

Related Problems

Find third proportional to 181.50 and 257.50
Half scale
Find third proportional to 726 and 1,030
Double scale
Find third proportional to 365 and 518
Similar ratio
Find third proportional to 544.50 and 772.50
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.