Home / 721,108.45-995,436.08-449,310.64

Finding the Fourth Proportional to 721,108.45, 995,436.08 and 449,310.64

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Solution

The fourth proportional to 721,108.45, 995,436.08 and 449,310.64 is: 620,239.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,108.45 : 995,436.08 = 449,310.64 : x
  2. Step 2: Convert to fraction form
    721,108.45/995,436.08 = 449,310.64/x
  3. Step 3: Cross multiply
    721,108.45x = 995,436.08 × 449,310.64
  4. Step 4: Simplify right side
    721,108.45x = 447,260,019,984.27
  5. Step 5: Solve for x
    x = 447,260,019,984.27/721,108.45
  6. Step 6: Final answer
    x = 620,239.60

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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.