Home / 280,719-420,714

Finding the Third Proportional to 280,719 and 420,714

Calculator

Solution

The third proportional to 280,719 and 420,714 is: 630,524.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,719 : 420,714 = 420,714 : x
  2. Step 2: Convert to fraction form
    280,719/420,714 = 420,714/x
  3. Step 3: Cross multiply
    280,719x = 420,714 × 420,714
  4. Step 4: Simplify right side
    280,719x = 177,000,269,796
  5. Step 5: Solve for x
    x = 177,000,269,796/280,719
  6. Step 6: Final answer
    x = 630,524.72

Related Problems

Find third proportional to 140,359.50 and 210,357
Half scale
Find third proportional to 561,438 and 841,428
Double scale
Find third proportional to 280,721 and 420,717
Similar ratio
Find third proportional to 421,078.50 and 631,071
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.