Home / 555-606

Finding the Third Proportional to 555 and 606

Calculator

Solution

The third proportional to 555 and 606 is: 661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    555 : 606 = 606 : x
  2. Step 2: Convert to fraction form
    555/606 = 606/x
  3. Step 3: Cross multiply
    555x = 606 × 606
  4. Step 4: Simplify right side
    555x = 367,236
  5. Step 5: Solve for x
    x = 367,236/555
  6. Step 6: Final answer
    x = 661.69

Related Problems

Find third proportional to 277.50 and 303
Half scale
Find third proportional to 1,110 and 1,212
Double scale
Find third proportional to 557 and 608
Similar ratio
Find third proportional to 832.50 and 909
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.