Home / 128,634-278,646

Finding the Third Proportional to 128,634 and 278,646

Calculator

Solution

The third proportional to 128,634 and 278,646 is: 603,600.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,634 : 278,646 = 278,646 : x
  2. Step 2: Convert to fraction form
    128,634/278,646 = 278,646/x
  3. Step 3: Cross multiply
    128,634x = 278,646 × 278,646
  4. Step 4: Simplify right side
    128,634x = 77,643,593,316
  5. Step 5: Solve for x
    x = 77,643,593,316/128,634
  6. Step 6: Final answer
    x = 603,600.86

Related Problems

Find third proportional to 64,317 and 139,323
Half scale
Find third proportional to 257,268 and 557,292
Double scale
Find third proportional to 128,636 and 278,650
Similar ratio
Find third proportional to 192,951 and 417,969
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.