Home / 319.38-439.75

Finding the Third Proportional to 319.38 and 439.75

Calculator

Solution

The third proportional to 319.38 and 439.75 is: 605.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.38 : 439.75 = 439.75 : x
  2. Step 2: Convert to fraction form
    319.38/439.75 = 439.75/x
  3. Step 3: Cross multiply
    319.38x = 439.75 × 439.75
  4. Step 4: Simplify right side
    319.38x = 193,380.06
  5. Step 5: Solve for x
    x = 193,380.06/319.38
  6. Step 6: Final answer
    x = 605.50

Related Problems

Find third proportional to 159.69 and 219.88
Half scale
Find third proportional to 638.75 and 879.50
Double scale
Find third proportional to 321 and 443
Similar ratio
Find third proportional to 479.06 and 659.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.