Home / 331.50-389

Finding the Third Proportional to 331.50 and 389

Calculator

Solution

The third proportional to 331.50 and 389 is: 456.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.50 : 389 = 389 : x
  2. Step 2: Convert to fraction form
    331.50/389 = 389/x
  3. Step 3: Cross multiply
    331.50x = 389 × 389
  4. Step 4: Simplify right side
    331.50x = 151,321
  5. Step 5: Solve for x
    x = 151,321/331.50
  6. Step 6: Final answer
    x = 456.47

Related Problems

Find third proportional to 165.75 and 194.50
Half scale
Find third proportional to 663 and 778
Double scale
Find third proportional to 334 and 391
Similar ratio
Find third proportional to 497.25 and 583.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.