Home / 206.25-279.75

Finding the Third Proportional to 206.25 and 279.75

Calculator

Solution

The third proportional to 206.25 and 279.75 is: 379.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.25 : 279.75 = 279.75 : x
  2. Step 2: Convert to fraction form
    206.25/279.75 = 279.75/x
  3. Step 3: Cross multiply
    206.25x = 279.75 × 279.75
  4. Step 4: Simplify right side
    206.25x = 78,260.06
  5. Step 5: Solve for x
    x = 78,260.06/206.25
  6. Step 6: Final answer
    x = 379.44

Related Problems

Find third proportional to 103.13 and 139.88
Half scale
Find third proportional to 412.50 and 559.50
Double scale
Find third proportional to 208 and 282
Similar ratio
Find third proportional to 309.38 and 419.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.