Home / 270,426-420,921

Finding the Third Proportional to 270,426 and 420,921

Calculator

Solution

The third proportional to 270,426 and 420,921 is: 655,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,426 : 420,921 = 420,921 : x
  2. Step 2: Convert to fraction form
    270,426/420,921 = 420,921/x
  3. Step 3: Cross multiply
    270,426x = 420,921 × 420,921
  4. Step 4: Simplify right side
    270,426x = 177,174,488,241
  5. Step 5: Solve for x
    x = 177,174,488,241/270,426
  6. Step 6: Final answer
    x = 655,168.10

Related Problems

Find third proportional to 135,213 and 210,460.50
Half scale
Find third proportional to 540,852 and 841,842
Double scale
Find third proportional to 270,428 and 420,924
Similar ratio
Find third proportional to 405,639 and 631,381.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.