Home / 234-391

Finding the Third Proportional to 234 and 391

Calculator

Solution

The third proportional to 234 and 391 is: 653.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    234 : 391 = 391 : x
  2. Step 2: Convert to fraction form
    234/391 = 391/x
  3. Step 3: Cross multiply
    234x = 391 × 391
  4. Step 4: Simplify right side
    234x = 152,881
  5. Step 5: Solve for x
    x = 152,881/234
  6. Step 6: Final answer
    x = 653.34

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.