Home / 313-426

Finding the Third Proportional to 313 and 426

Calculator

Solution

The third proportional to 313 and 426 is: 579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    313 : 426 = 426 : x
  2. Step 2: Convert to fraction form
    313/426 = 426/x
  3. Step 3: Cross multiply
    313x = 426 × 426
  4. Step 4: Simplify right side
    313x = 181,476
  5. Step 5: Solve for x
    x = 181,476/313
  6. Step 6: Final answer
    x = 579.80

Related Problems

Find third proportional to 156.50 and 213
Half scale
Find third proportional to 626 and 852
Double scale
Find third proportional to 315 and 429
Similar ratio
Find third proportional to 469.50 and 639
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.