Home / 256,612-617,428

Finding the Third Proportional to 256,612 and 617,428

Calculator

Solution

The third proportional to 256,612 and 617,428 is: 1,485,578.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,612 : 617,428 = 617,428 : x
  2. Step 2: Convert to fraction form
    256,612/617,428 = 617,428/x
  3. Step 3: Cross multiply
    256,612x = 617,428 × 617,428
  4. Step 4: Simplify right side
    256,612x = 381,217,335,184
  5. Step 5: Solve for x
    x = 381,217,335,184/256,612
  6. Step 6: Final answer
    x = 1,485,578.75

Related Problems

Find third proportional to 128,306 and 308,714
Half scale
Find third proportional to 513,224 and 1,234,856
Double scale
Find third proportional to 256,614 and 617,433
Similar ratio
Find third proportional to 384,918 and 926,142
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.