Home / 98.40-211.68

Finding the Third Proportional to 98.40 and 211.68

Calculator

Solution

The third proportional to 98.40 and 211.68 is: 455.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.40 : 211.68 = 211.68 : x
  2. Step 2: Convert to fraction form
    98.40/211.68 = 211.68/x
  3. Step 3: Cross multiply
    98.40x = 211.68 × 211.68
  4. Step 4: Simplify right side
    98.40x = 44,806.64
  5. Step 5: Solve for x
    x = 44,806.64/98.40
  6. Step 6: Final answer
    x = 455.34

Related Problems

Find third proportional to 49.20 and 105.84
Half scale
Find third proportional to 196.80 and 423.35
Double scale
Find third proportional to 100 and 216
Similar ratio
Find third proportional to 147.60 and 317.51
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.