Home / 253.69-394.13

Finding the Third Proportional to 253.69 and 394.13

Calculator

Solution

The third proportional to 253.69 and 394.13 is: 612.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.69 : 394.13 = 394.13 : x
  2. Step 2: Convert to fraction form
    253.69/394.13 = 394.13/x
  3. Step 3: Cross multiply
    253.69x = 394.13 × 394.13
  4. Step 4: Simplify right side
    253.69x = 155,334.52
  5. Step 5: Solve for x
    x = 155,334.52/253.69
  6. Step 6: Final answer
    x = 612.31

Related Problems

Find third proportional to 126.84 and 197.06
Half scale
Find third proportional to 507.38 and 788.25
Double scale
Find third proportional to 256 and 397
Similar ratio
Find third proportional to 380.53 and 591.19
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.