Home / 555-615.75

Finding the Third Proportional to 555 and 615.75

Calculator

Solution

The third proportional to 555 and 615.75 is: 683.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    555 : 615.75 = 615.75 : x
  2. Step 2: Convert to fraction form
    555/615.75 = 615.75/x
  3. Step 3: Cross multiply
    555x = 615.75 × 615.75
  4. Step 4: Simplify right side
    555x = 379,148.06
  5. Step 5: Solve for x
    x = 379,148.06/555
  6. Step 6: Final answer
    x = 683.15

Related Problems

Find third proportional to 277.50 and 307.88
Half scale
Find third proportional to 1,110 and 1,231.50
Double scale
Find third proportional to 557 and 618
Similar ratio
Find third proportional to 832.50 and 923.63
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.