Home / 317,286-686,844

Finding the Third Proportional to 317,286 and 686,844

Calculator

Solution

The third proportional to 317,286 and 686,844 is: 1,486,843.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,286 : 686,844 = 686,844 : x
  2. Step 2: Convert to fraction form
    317,286/686,844 = 686,844/x
  3. Step 3: Cross multiply
    317,286x = 686,844 × 686,844
  4. Step 4: Simplify right side
    317,286x = 471,754,680,336
  5. Step 5: Solve for x
    x = 471,754,680,336/317,286
  6. Step 6: Final answer
    x = 1,486,843.67

Related Problems

Find third proportional to 158,643 and 343,422
Half scale
Find third proportional to 634,572 and 1,373,688
Double scale
Find third proportional to 317,288 and 686,848
Similar ratio
Find third proportional to 475,929 and 1,030,266
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.