Home / 478.50-612

Finding the Third Proportional to 478.50 and 612

Calculator

Solution

The third proportional to 478.50 and 612 is: 782.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.50 : 612 = 612 : x
  2. Step 2: Convert to fraction form
    478.50/612 = 612/x
  3. Step 3: Cross multiply
    478.50x = 612 × 612
  4. Step 4: Simplify right side
    478.50x = 374,544
  5. Step 5: Solve for x
    x = 374,544/478.50
  6. Step 6: Final answer
    x = 782.75

Related Problems

Find third proportional to 239.25 and 306
Half scale
Find third proportional to 957 and 1,224
Double scale
Find third proportional to 481 and 615
Similar ratio
Find third proportional to 717.75 and 918
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.