Home / 280,079-420,323

Finding the Third Proportional to 280,079 and 420,323

Calculator

Solution

The third proportional to 280,079 and 420,323 is: 630,791.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,079 : 420,323 = 420,323 : x
  2. Step 2: Convert to fraction form
    280,079/420,323 = 420,323/x
  3. Step 3: Cross multiply
    280,079x = 420,323 × 420,323
  4. Step 4: Simplify right side
    280,079x = 176,671,424,329
  5. Step 5: Solve for x
    x = 176,671,424,329/280,079
  6. Step 6: Final answer
    x = 630,791.40

Related Problems

Find third proportional to 140,039.50 and 210,161.50
Half scale
Find third proportional to 560,158 and 840,646
Double scale
Find third proportional to 280,081 and 420,326
Similar ratio
Find third proportional to 420,118.50 and 630,484.50
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.