Home / 380,387-803,209

Finding the Third Proportional to 380,387 and 803,209

Calculator

Solution

The third proportional to 380,387 and 803,209 is: 1,696,021.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,387 : 803,209 = 803,209 : x
  2. Step 2: Convert to fraction form
    380,387/803,209 = 803,209/x
  3. Step 3: Cross multiply
    380,387x = 803,209 × 803,209
  4. Step 4: Simplify right side
    380,387x = 645,144,697,681
  5. Step 5: Solve for x
    x = 645,144,697,681/380,387
  6. Step 6: Final answer
    x = 1,696,021.94

Related Problems

Find third proportional to 190,193.50 and 401,604.50
Half scale
Find third proportional to 760,774 and 1,606,418
Double scale
Find third proportional to 380,389 and 803,213
Similar ratio
Find third proportional to 570,580.50 and 1,204,813.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.