Home / 128,354-281,508

Finding the Third Proportional to 128,354 and 281,508

Calculator

Solution

The third proportional to 128,354 and 281,508 is: 617,407.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,354 : 281,508 = 281,508 : x
  2. Step 2: Convert to fraction form
    128,354/281,508 = 281,508/x
  3. Step 3: Cross multiply
    128,354x = 281,508 × 281,508
  4. Step 4: Simplify right side
    128,354x = 79,246,754,064
  5. Step 5: Solve for x
    x = 79,246,754,064/128,354
  6. Step 6: Final answer
    x = 617,407.75

Related Problems

Find third proportional to 64,177 and 140,754
Half scale
Find third proportional to 256,708 and 563,016
Double scale
Find third proportional to 128,356 and 281,512
Similar ratio
Find third proportional to 192,531 and 422,262
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.