Home / 318,615-688,851

Finding the Third Proportional to 318,615 and 688,851

Calculator

Solution

The third proportional to 318,615 and 688,851 is: 1,489,307.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,615 : 688,851 = 688,851 : x
  2. Step 2: Convert to fraction form
    318,615/688,851 = 688,851/x
  3. Step 3: Cross multiply
    318,615x = 688,851 × 688,851
  4. Step 4: Simplify right side
    318,615x = 474,515,700,201
  5. Step 5: Solve for x
    x = 474,515,700,201/318,615
  6. Step 6: Final answer
    x = 1,489,307.47

Related Problems

Find third proportional to 159,307.50 and 344,425.50
Half scale
Find third proportional to 637,230 and 1,377,702
Double scale
Find third proportional to 318,617 and 688,855
Similar ratio
Find third proportional to 477,922.50 and 1,033,276.50
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.