Home / 273.56-643.13

Finding the Third Proportional to 273.56 and 643.13

Calculator

Solution

The third proportional to 273.56 and 643.13 is: 1,511.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    273.56 : 643.13 = 643.13 : x
  2. Step 2: Convert to fraction form
    273.56/643.13 = 643.13/x
  3. Step 3: Cross multiply
    273.56x = 643.13 × 643.13
  4. Step 4: Simplify right side
    273.56x = 413,609.77
  5. Step 5: Solve for x
    x = 413,609.77/273.56
  6. Step 6: Final answer
    x = 1,511.94

Related Problems

Find third proportional to 136.78 and 321.56
Half scale
Find third proportional to 547.13 and 1,286.25
Double scale
Find third proportional to 276 and 648
Similar ratio
Find third proportional to 410.34 and 964.69
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.