Home / 569.11-621.42

Finding the Third Proportional to 569.11 and 621.42

Calculator

Solution

The third proportional to 569.11 and 621.42 is: 678.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.11 : 621.42 = 621.42 : x
  2. Step 2: Convert to fraction form
    569.11/621.42 = 621.42/x
  3. Step 3: Cross multiply
    569.11x = 621.42 × 621.42
  4. Step 4: Simplify right side
    569.11x = 386,165.15
  5. Step 5: Solve for x
    x = 386,165.15/569.11
  6. Step 6: Final answer
    x = 678.54

Related Problems

Find third proportional to 284.55 and 310.71
Half scale
Find third proportional to 1,138.22 and 1,242.84
Double scale
Find third proportional to 571 and 624
Similar ratio
Find third proportional to 853.66 and 932.13
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.