Home / 313,342-643,272

Finding the Third Proportional to 313,342 and 643,272

Calculator

Solution

The third proportional to 313,342 and 643,272 is: 1,320,598.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,342 : 643,272 = 643,272 : x
  2. Step 2: Convert to fraction form
    313,342/643,272 = 643,272/x
  3. Step 3: Cross multiply
    313,342x = 643,272 × 643,272
  4. Step 4: Simplify right side
    313,342x = 413,798,865,984
  5. Step 5: Solve for x
    x = 413,798,865,984/313,342
  6. Step 6: Final answer
    x = 1,320,598.15

Related Problems

Find third proportional to 156,671 and 321,636
Half scale
Find third proportional to 626,684 and 1,286,544
Double scale
Find third proportional to 313,344 and 643,276
Similar ratio
Find third proportional to 470,013 and 964,908
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.