Home / 391,392-540,120.96-212,544

Finding the Fourth Proportional to 391,392, 540,120.96 and 212,544

Calculator

Solution

The fourth proportional to 391,392, 540,120.96 and 212,544 is: 293,310.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,392 : 540,120.96 = 212,544 : x
  2. Step 2: Convert to fraction form
    391,392/540,120.96 = 212,544/x
  3. Step 3: Cross multiply
    391,392x = 540,120.96 × 212,544
  4. Step 4: Simplify right side
    391,392x = 114,799,469,322.24
  5. Step 5: Solve for x
    x = 114,799,469,322.24/391,392
  6. Step 6: Final answer
    x = 293,310.72

Related Problems

Find fourth proportional to 195,696, 270,060.48 and 106,272
Half scale
Find fourth proportional to 782,784, 1,080,241.92 and 425,088
Double scale
Find fourth proportional to 391,393, 540,122.34 and 212,545
Similar ratio
Find fourth proportional to 587,088, 810,181.44 and 318,816
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.