Home / 128,914-285,476

Finding the Third Proportional to 128,914 and 285,476

Calculator

Solution

The third proportional to 128,914 and 285,476 is: 632,177.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914 : 285,476 = 285,476 : x
  2. Step 2: Convert to fraction form
    128,914/285,476 = 285,476/x
  3. Step 3: Cross multiply
    128,914x = 285,476 × 285,476
  4. Step 4: Simplify right side
    128,914x = 81,496,546,576
  5. Step 5: Solve for x
    x = 81,496,546,576/128,914
  6. Step 6: Final answer
    x = 632,177.63

Related Problems

Find third proportional to 64,457 and 142,738
Half scale
Find third proportional to 257,828 and 570,952
Double scale
Find third proportional to 128,916 and 285,480
Similar ratio
Find third proportional to 193,371 and 428,214
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.