Home / 257.38-276.75

Finding the Third Proportional to 257.38 and 276.75

Calculator

Solution

The third proportional to 257.38 and 276.75 is: 297.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.38 : 276.75 = 276.75 : x
  2. Step 2: Convert to fraction form
    257.38/276.75 = 276.75/x
  3. Step 3: Cross multiply
    257.38x = 276.75 × 276.75
  4. Step 4: Simplify right side
    257.38x = 76,590.56
  5. Step 5: Solve for x
    x = 76,590.56/257.38
  6. Step 6: Final answer
    x = 297.58

Related Problems

Find third proportional to 128.69 and 138.38
Half scale
Find third proportional to 514.75 and 553.50
Double scale
Find third proportional to 259 and 279
Similar ratio
Find third proportional to 386.06 and 415.13
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.