Home / 820,199,124.72-1,229,800,459.32-321,612,286.05

Finding the Fourth Proportional to 820,199,124.72, 1,229,800,459.32 and 321,612,286.05

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Solution

The fourth proportional to 820,199,124.72, 1,229,800,459.32 and 321,612,286.05 is: 482,223,066.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,199,124.72 : 1,229,800,459.32 = 321,612,286.05 : x
  2. Step 2: Convert to fraction form
    820,199,124.72/1,229,800,459.32 = 321,612,286.05/x
  3. Step 3: Cross multiply
    820,199,124.72x = 1,229,800,459.32 × 321,612,286.05
  4. Step 4: Simplify right side
    820,199,124.72x = 395,518,937,107,245,248
  5. Step 5: Solve for x
    x = 395,518,937,107,245,248/820,199,124.72
  6. Step 6: Final answer
    x = 482,223,066.55

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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.