Home / 288,417-621,207

Finding the Third Proportional to 288,417 and 621,207

Calculator

Solution

The third proportional to 288,417 and 621,207 is: 1,337,986.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,417 : 621,207 = 621,207 : x
  2. Step 2: Convert to fraction form
    288,417/621,207 = 621,207/x
  3. Step 3: Cross multiply
    288,417x = 621,207 × 621,207
  4. Step 4: Simplify right side
    288,417x = 385,898,136,849
  5. Step 5: Solve for x
    x = 385,898,136,849/288,417
  6. Step 6: Final answer
    x = 1,337,986.79

Related Problems

Find third proportional to 144,208.50 and 310,603.50
Half scale
Find third proportional to 576,834 and 1,242,414
Double scale
Find third proportional to 288,419 and 621,211
Similar ratio
Find third proportional to 432,625.50 and 931,810.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.