Home / 512.50-1,115

Finding the Third Proportional to 512.50 and 1,115

Calculator

Solution

The third proportional to 512.50 and 1,115 is: 2,425.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.50 : 1,115 = 1,115 : x
  2. Step 2: Convert to fraction form
    512.50/1,115 = 1,115/x
  3. Step 3: Cross multiply
    512.50x = 1,115 × 1,115
  4. Step 4: Simplify right side
    512.50x = 1,243,225
  5. Step 5: Solve for x
    x = 1,243,225/512.50
  6. Step 6: Final answer
    x = 2,425.80

Related Problems

Find third proportional to 256.25 and 557.50
Half scale
Find third proportional to 1,025 and 2,230
Double scale
Find third proportional to 515 and 1,119
Similar ratio
Find third proportional to 768.75 and 1,672.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.