Home / 987.75-2,172

Finding the Third Proportional to 987.75 and 2,172

Calculator

Solution

The third proportional to 987.75 and 2,172 is: 4,776.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.75 : 2,172 = 2,172 : x
  2. Step 2: Convert to fraction form
    987.75/2,172 = 2,172/x
  3. Step 3: Cross multiply
    987.75x = 2,172 × 2,172
  4. Step 4: Simplify right side
    987.75x = 4,717,584
  5. Step 5: Solve for x
    x = 4,717,584/987.75
  6. Step 6: Final answer
    x = 4,776.09

Related Problems

Find third proportional to 493.88 and 1,086
Half scale
Find third proportional to 1,975.50 and 4,344
Double scale
Find third proportional to 990 and 2,176
Similar ratio
Find third proportional to 1,481.63 and 3,258
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.