Home / 151-317

Finding the Third Proportional to 151 and 317

Calculator

Solution

The third proportional to 151 and 317 is: 665.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    151 : 317 = 317 : x
  2. Step 2: Convert to fraction form
    151/317 = 317/x
  3. Step 3: Cross multiply
    151x = 317 × 317
  4. Step 4: Simplify right side
    151x = 100,489
  5. Step 5: Solve for x
    x = 100,489/151
  6. Step 6: Final answer
    x = 665.49

Related Problems

Find third proportional to 75.50 and 158.50
Half scale
Find third proportional to 302 and 634
Double scale
Find third proportional to 153 and 321
Similar ratio
Find third proportional to 226.50 and 475.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.