Home / 190,815-280,388

Finding the Third Proportional to 190,815 and 280,388

Calculator

Solution

The third proportional to 190,815 and 280,388 is: 412,008.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,815 : 280,388 = 280,388 : x
  2. Step 2: Convert to fraction form
    190,815/280,388 = 280,388/x
  3. Step 3: Cross multiply
    190,815x = 280,388 × 280,388
  4. Step 4: Simplify right side
    190,815x = 78,617,430,544
  5. Step 5: Solve for x
    x = 78,617,430,544/190,815
  6. Step 6: Final answer
    x = 412,008.65

Related Problems

Find third proportional to 95,407.50 and 140,194
Half scale
Find third proportional to 381,630 and 560,776
Double scale
Find third proportional to 190,817 and 280,391
Similar ratio
Find third proportional to 286,222.50 and 420,582
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.