Home / 239.50-318.50

Finding the Third Proportional to 239.50 and 318.50

Calculator

Solution

The third proportional to 239.50 and 318.50 is: 423.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.50 : 318.50 = 318.50 : x
  2. Step 2: Convert to fraction form
    239.50/318.50 = 318.50/x
  3. Step 3: Cross multiply
    239.50x = 318.50 × 318.50
  4. Step 4: Simplify right side
    239.50x = 101,442.25
  5. Step 5: Solve for x
    x = 101,442.25/239.50
  6. Step 6: Final answer
    x = 423.56

Related Problems

Find third proportional to 119.75 and 159.25
Half scale
Find third proportional to 479 and 637
Double scale
Find third proportional to 242 and 321
Similar ratio
Find third proportional to 359.25 and 477.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.