Home / 390,242-851,206

Finding the Third Proportional to 390,242 and 851,206

Calculator

Solution

The third proportional to 390,242 and 851,206 is: 1,856,672.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,242 : 851,206 = 851,206 : x
  2. Step 2: Convert to fraction form
    390,242/851,206 = 851,206/x
  3. Step 3: Cross multiply
    390,242x = 851,206 × 851,206
  4. Step 4: Simplify right side
    390,242x = 724,551,654,436
  5. Step 5: Solve for x
    x = 724,551,654,436/390,242
  6. Step 6: Final answer
    x = 1,856,672.67

Related Problems

Find third proportional to 195,121 and 425,603
Half scale
Find third proportional to 780,484 and 1,702,412
Double scale
Find third proportional to 390,244 and 851,210
Similar ratio
Find third proportional to 585,363 and 1,276,809
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.