Home / 396.42-577.55

Finding the Third Proportional to 396.42 and 577.55

Calculator

Solution

The third proportional to 396.42 and 577.55 is: 841.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.42 : 577.55 = 577.55 : x
  2. Step 2: Convert to fraction form
    396.42/577.55 = 577.55/x
  3. Step 3: Cross multiply
    396.42x = 577.55 × 577.55
  4. Step 4: Simplify right side
    396.42x = 333,560.39
  5. Step 5: Solve for x
    x = 333,560.39/396.42
  6. Step 6: Final answer
    x = 841.43

Related Problems

Find third proportional to 198.21 and 288.77
Half scale
Find third proportional to 792.84 and 1,155.09
Double scale
Find third proportional to 398 and 580
Similar ratio
Find third proportional to 594.63 and 866.32
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.