Home / 286.50-318.50

Finding the Third Proportional to 286.50 and 318.50

Calculator

Solution

The third proportional to 286.50 and 318.50 is: 354.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.50 : 318.50 = 318.50 : x
  2. Step 2: Convert to fraction form
    286.50/318.50 = 318.50/x
  3. Step 3: Cross multiply
    286.50x = 318.50 × 318.50
  4. Step 4: Simplify right side
    286.50x = 101,442.25
  5. Step 5: Solve for x
    x = 101,442.25/286.50
  6. Step 6: Final answer
    x = 354.07

Related Problems

Find third proportional to 143.25 and 159.25
Half scale
Find third proportional to 573 and 637
Double scale
Find third proportional to 289 and 321
Similar ratio
Find third proportional to 429.75 and 477.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.