Home / 289,985-636,707

Finding the Third Proportional to 289,985 and 636,707

Calculator

Solution

The third proportional to 289,985 and 636,707 is: 1,397,988.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,985 : 636,707 = 636,707 : x
  2. Step 2: Convert to fraction form
    289,985/636,707 = 636,707/x
  3. Step 3: Cross multiply
    289,985x = 636,707 × 636,707
  4. Step 4: Simplify right side
    289,985x = 405,395,803,849
  5. Step 5: Solve for x
    x = 405,395,803,849/289,985
  6. Step 6: Final answer
    x = 1,397,988.87

Related Problems

Find third proportional to 144,992.50 and 318,353.50
Half scale
Find third proportional to 579,970 and 1,273,414
Double scale
Find third proportional to 289,987 and 636,711
Similar ratio
Find third proportional to 434,977.50 and 955,060.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.