Home / 278.75-433.38

Finding the Third Proportional to 278.75 and 433.38

Calculator

Solution

The third proportional to 278.75 and 433.38 is: 673.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.75 : 433.38 = 433.38 : x
  2. Step 2: Convert to fraction form
    278.75/433.38 = 433.38/x
  3. Step 3: Cross multiply
    278.75x = 433.38 × 433.38
  4. Step 4: Simplify right side
    278.75x = 187,813.89
  5. Step 5: Solve for x
    x = 187,813.89/278.75
  6. Step 6: Final answer
    x = 673.77

Related Problems

Find third proportional to 139.38 and 216.69
Half scale
Find third proportional to 557.50 and 866.75
Double scale
Find third proportional to 281 and 436
Similar ratio
Find third proportional to 418.13 and 650.06
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.