Home / 101.81-218.81

Finding the Third Proportional to 101.81 and 218.81

Calculator

Solution

The third proportional to 101.81 and 218.81 is: 470.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.81 : 218.81 = 218.81 : x
  2. Step 2: Convert to fraction form
    101.81/218.81 = 218.81/x
  3. Step 3: Cross multiply
    101.81x = 218.81 × 218.81
  4. Step 4: Simplify right side
    101.81x = 47,878.91
  5. Step 5: Solve for x
    x = 47,878.91/101.81
  6. Step 6: Final answer
    x = 470.27

Related Problems

Find third proportional to 50.91 and 109.41
Half scale
Find third proportional to 203.63 and 437.63
Double scale
Find third proportional to 104 and 223
Similar ratio
Find third proportional to 152.72 and 328.22
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.