Home / 721,119.20-995,450.85-449,321.36

Finding the Fourth Proportional to 721,119.20, 995,450.85 and 449,321.36

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Solution

The fourth proportional to 721,119.20, 995,450.85 and 449,321.36 is: 620,254.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,119.20 : 995,450.85 = 449,321.36 : x
  2. Step 2: Convert to fraction form
    721,119.20/995,450.85 = 449,321.36/x
  3. Step 3: Cross multiply
    721,119.20x = 995,450.85 × 449,321.36
  4. Step 4: Simplify right side
    721,119.20x = 447,277,324,757.90
  5. Step 5: Solve for x
    x = 447,277,324,757.90/721,119.20
  6. Step 6: Final answer
    x = 620,254.36

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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.