Home / 151.88-312.19

Finding the Third Proportional to 151.88 and 312.19

Calculator

Solution

The third proportional to 151.88 and 312.19 is: 641.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.88 : 312.19 = 312.19 : x
  2. Step 2: Convert to fraction form
    151.88/312.19 = 312.19/x
  3. Step 3: Cross multiply
    151.88x = 312.19 × 312.19
  4. Step 4: Simplify right side
    151.88x = 97,461.04
  5. Step 5: Solve for x
    x = 97,461.04/151.88
  6. Step 6: Final answer
    x = 641.72

Related Problems

Find third proportional to 75.94 and 156.09
Half scale
Find third proportional to 303.75 and 624.38
Double scale
Find third proportional to 154 and 316
Similar ratio
Find third proportional to 227.81 and 468.28
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.