Home / 343,440-505,215

Finding the Third Proportional to 343,440 and 505,215

Calculator

Solution

The third proportional to 343,440 and 505,215 is: 743,192.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,440 : 505,215 = 505,215 : x
  2. Step 2: Convert to fraction form
    343,440/505,215 = 505,215/x
  3. Step 3: Cross multiply
    343,440x = 505,215 × 505,215
  4. Step 4: Simplify right side
    343,440x = 255,242,196,225
  5. Step 5: Solve for x
    x = 255,242,196,225/343,440
  6. Step 6: Final answer
    x = 743,192.98

Related Problems

Find third proportional to 171,720 and 252,607.50
Half scale
Find third proportional to 686,880 and 1,010,430
Double scale
Find third proportional to 343,442 and 505,218
Similar ratio
Find third proportional to 515,160 and 757,822.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.