Home / 272,880-420,976

Finding the Third Proportional to 272,880 and 420,976

Calculator

Solution

The third proportional to 272,880 and 420,976 is: 649,445.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,880 : 420,976 = 420,976 : x
  2. Step 2: Convert to fraction form
    272,880/420,976 = 420,976/x
  3. Step 3: Cross multiply
    272,880x = 420,976 × 420,976
  4. Step 4: Simplify right side
    272,880x = 177,220,792,576
  5. Step 5: Solve for x
    x = 177,220,792,576/272,880
  6. Step 6: Final answer
    x = 649,445.88

Related Problems

Find third proportional to 136,440 and 210,488
Half scale
Find third proportional to 545,760 and 841,952
Double scale
Find third proportional to 272,882 and 420,979
Similar ratio
Find third proportional to 409,320 and 631,464
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.