Home / 128,356-281,512

Finding the Third Proportional to 128,356 and 281,512

Calculator

Solution

The third proportional to 128,356 and 281,512 is: 617,415.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,356 : 281,512 = 281,512 : x
  2. Step 2: Convert to fraction form
    128,356/281,512 = 281,512/x
  3. Step 3: Cross multiply
    128,356x = 281,512 × 281,512
  4. Step 4: Simplify right side
    128,356x = 79,249,006,144
  5. Step 5: Solve for x
    x = 79,249,006,144/128,356
  6. Step 6: Final answer
    x = 617,415.67

Related Problems

Find third proportional to 64,178 and 140,756
Half scale
Find third proportional to 256,712 and 563,024
Double scale
Find third proportional to 128,358 and 281,516
Similar ratio
Find third proportional to 192,534 and 422,268
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.