Home / 317,208-686,688

Finding the Third Proportional to 317,208 and 686,688

Calculator

Solution

The third proportional to 317,208 and 686,688 is: 1,486,533.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,208 : 686,688 = 686,688 : x
  2. Step 2: Convert to fraction form
    317,208/686,688 = 686,688/x
  3. Step 3: Cross multiply
    317,208x = 686,688 × 686,688
  4. Step 4: Simplify right side
    317,208x = 471,540,409,344
  5. Step 5: Solve for x
    x = 471,540,409,344/317,208
  6. Step 6: Final answer
    x = 1,486,533.79

Related Problems

Find third proportional to 158,604 and 343,344
Half scale
Find third proportional to 634,416 and 1,373,376
Double scale
Find third proportional to 317,210 and 686,692
Similar ratio
Find third proportional to 475,812 and 1,030,032
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.