Home / 479.75-678.75

Finding the Third Proportional to 479.75 and 678.75

Calculator

Solution

The third proportional to 479.75 and 678.75 is: 960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.75 : 678.75 = 678.75 : x
  2. Step 2: Convert to fraction form
    479.75/678.75 = 678.75/x
  3. Step 3: Cross multiply
    479.75x = 678.75 × 678.75
  4. Step 4: Simplify right side
    479.75x = 460,701.56
  5. Step 5: Solve for x
    x = 460,701.56/479.75
  6. Step 6: Final answer
    x = 960.30

Related Problems

Find third proportional to 239.88 and 339.38
Half scale
Find third proportional to 959.50 and 1,357.50
Double scale
Find third proportional to 482 and 682
Similar ratio
Find third proportional to 719.63 and 1,018.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.