Home / 384.75-396.25

Finding the Third Proportional to 384.75 and 396.25

Calculator

Solution

The third proportional to 384.75 and 396.25 is: 408.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.75 : 396.25 = 396.25 : x
  2. Step 2: Convert to fraction form
    384.75/396.25 = 396.25/x
  3. Step 3: Cross multiply
    384.75x = 396.25 × 396.25
  4. Step 4: Simplify right side
    384.75x = 157,014.06
  5. Step 5: Solve for x
    x = 157,014.06/384.75
  6. Step 6: Final answer
    x = 408.09

Related Problems

Find third proportional to 192.38 and 198.13
Half scale
Find third proportional to 769.50 and 792.50
Double scale
Find third proportional to 387 and 398
Similar ratio
Find third proportional to 577.13 and 594.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.