Home / 399,042-538,380

Finding the Third Proportional to 399,042 and 538,380

Calculator

Solution

The third proportional to 399,042 and 538,380 is: 726,372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,042 : 538,380 = 538,380 : x
  2. Step 2: Convert to fraction form
    399,042/538,380 = 538,380/x
  3. Step 3: Cross multiply
    399,042x = 538,380 × 538,380
  4. Step 4: Simplify right side
    399,042x = 289,853,024,400
  5. Step 5: Solve for x
    x = 289,853,024,400/399,042
  6. Step 6: Final answer
    x = 726,372.22

Related Problems

Find third proportional to 199,521 and 269,190
Half scale
Find third proportional to 798,084 and 1,076,760
Double scale
Find third proportional to 399,044 and 538,383
Similar ratio
Find third proportional to 598,563 and 807,570
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.