Home / 286.88-445.31

Finding the Third Proportional to 286.88 and 445.31

Calculator

Solution

The third proportional to 286.88 and 445.31 is: 691.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.88 : 445.31 = 445.31 : x
  2. Step 2: Convert to fraction form
    286.88/445.31 = 445.31/x
  3. Step 3: Cross multiply
    286.88x = 445.31 × 445.31
  4. Step 4: Simplify right side
    286.88x = 198,303.22
  5. Step 5: Solve for x
    x = 198,303.22/286.88
  6. Step 6: Final answer
    x = 691.25

Related Problems

Find third proportional to 143.44 and 222.66
Half scale
Find third proportional to 573.75 and 890.63
Double scale
Find third proportional to 289 and 448
Similar ratio
Find third proportional to 430.31 and 667.97
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.