Home / 260.75-389.75

Finding the Third Proportional to 260.75 and 389.75

Calculator

Solution

The third proportional to 260.75 and 389.75 is: 582.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.75 : 389.75 = 389.75 : x
  2. Step 2: Convert to fraction form
    260.75/389.75 = 389.75/x
  3. Step 3: Cross multiply
    260.75x = 389.75 × 389.75
  4. Step 4: Simplify right side
    260.75x = 151,905.06
  5. Step 5: Solve for x
    x = 151,905.06/260.75
  6. Step 6: Final answer
    x = 582.57

Related Problems

Find third proportional to 130.38 and 194.88
Half scale
Find third proportional to 521.50 and 779.50
Double scale
Find third proportional to 263 and 393
Similar ratio
Find third proportional to 391.13 and 584.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.