Home / 505,491,421.20-758,237,131.80-419,327,120.40

Finding the Fourth Proportional to 505,491,421.20, 758,237,131.80 and 419,327,120.40

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Solution

The fourth proportional to 505,491,421.20, 758,237,131.80 and 419,327,120.40 is: 628,990,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,491,421.20 : 758,237,131.80 = 419,327,120.40 : x
  2. Step 2: Convert to fraction form
    505,491,421.20/758,237,131.80 = 419,327,120.40/x
  3. Step 3: Cross multiply
    505,491,421.20x = 758,237,131.80 × 419,327,120.40
  4. Step 4: Simplify right side
    505,491,421.20x = 317,949,393,058,049,216
  5. Step 5: Solve for x
    x = 317,949,393,058,049,216/505,491,421.20
  6. Step 6: Final answer
    x = 628,990,680.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.