Home / 292,820-639,342

Finding the Third Proportional to 292,820 and 639,342

Calculator

Solution

The third proportional to 292,820 and 639,342 is: 1,395,936.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,820 : 639,342 = 639,342 : x
  2. Step 2: Convert to fraction form
    292,820/639,342 = 639,342/x
  3. Step 3: Cross multiply
    292,820x = 639,342 × 639,342
  4. Step 4: Simplify right side
    292,820x = 408,758,192,964
  5. Step 5: Solve for x
    x = 408,758,192,964/292,820
  6. Step 6: Final answer
    x = 1,395,936.73

Related Problems

Find third proportional to 146,410 and 319,671
Half scale
Find third proportional to 585,640 and 1,278,684
Double scale
Find third proportional to 292,822 and 639,346
Similar ratio
Find third proportional to 439,230 and 959,013
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.