Home / 157.31-328.97

Finding the Third Proportional to 157.31 and 328.97

Calculator

Solution

The third proportional to 157.31 and 328.97 is: 687.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.31 : 328.97 = 328.97 : x
  2. Step 2: Convert to fraction form
    157.31/328.97 = 328.97/x
  3. Step 3: Cross multiply
    157.31x = 328.97 × 328.97
  4. Step 4: Simplify right side
    157.31x = 108,220.44
  5. Step 5: Solve for x
    x = 108,220.44/157.31
  6. Step 6: Final answer
    x = 687.93

Related Problems

Find third proportional to 78.66 and 164.48
Half scale
Find third proportional to 314.63 and 657.94
Double scale
Find third proportional to 159 and 333
Similar ratio
Find third proportional to 235.97 and 493.45
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.