Home / 343.50-515

Finding the Third Proportional to 343.50 and 515

Calculator

Solution

The third proportional to 343.50 and 515 is: 772.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.50 : 515 = 515 : x
  2. Step 2: Convert to fraction form
    343.50/515 = 515/x
  3. Step 3: Cross multiply
    343.50x = 515 × 515
  4. Step 4: Simplify right side
    343.50x = 265,225
  5. Step 5: Solve for x
    x = 265,225/343.50
  6. Step 6: Final answer
    x = 772.13

Related Problems

Find third proportional to 171.75 and 257.50
Half scale
Find third proportional to 687 and 1,030
Double scale
Find third proportional to 346 and 518
Similar ratio
Find third proportional to 515.25 and 772.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.