Home / 318,172-686,184

Finding the Third Proportional to 318,172 and 686,184

Calculator

Solution

The third proportional to 318,172 and 686,184 is: 1,479,855.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,172 : 686,184 = 686,184 : x
  2. Step 2: Convert to fraction form
    318,172/686,184 = 686,184/x
  3. Step 3: Cross multiply
    318,172x = 686,184 × 686,184
  4. Step 4: Simplify right side
    318,172x = 470,848,481,856
  5. Step 5: Solve for x
    x = 470,848,481,856/318,172
  6. Step 6: Final answer
    x = 1,479,855.18

Related Problems

Find third proportional to 159,086 and 343,092
Half scale
Find third proportional to 636,344 and 1,372,368
Double scale
Find third proportional to 318,174 and 686,188
Similar ratio
Find third proportional to 477,258 and 1,029,276
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.