Home / 143.50-315

Finding the Third Proportional to 143.50 and 315

Calculator

Solution

The third proportional to 143.50 and 315 is: 691.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.50 : 315 = 315 : x
  2. Step 2: Convert to fraction form
    143.50/315 = 315/x
  3. Step 3: Cross multiply
    143.50x = 315 × 315
  4. Step 4: Simplify right side
    143.50x = 99,225
  5. Step 5: Solve for x
    x = 99,225/143.50
  6. Step 6: Final answer
    x = 691.46

Related Problems

Find third proportional to 71.75 and 157.50
Half scale
Find third proportional to 287 and 630
Double scale
Find third proportional to 146 and 319
Similar ratio
Find third proportional to 215.25 and 472.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.