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Finding the Fourth Proportional to 3,186.78, 4,780.85 and 995.67

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Solution

The fourth proportional to 3,186.78, 4,780.85 and 995.67 is: 1,493.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.78 : 4,780.85 = 995.67 : x
  2. Step 2: Convert to fraction form
    3,186.78/4,780.85 = 995.67/x
  3. Step 3: Cross multiply
    3,186.78x = 4,780.85 × 995.67
  4. Step 4: Simplify right side
    3,186.78x = 4,760,161.87
  5. Step 5: Solve for x
    x = 4,760,161.87/3,186.78
  6. Step 6: Final answer
    x = 1,493.72

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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.