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Finding the Fourth Proportional to 3,187.11, 4,780.67 and 995.85

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Solution

The fourth proportional to 3,187.11, 4,780.67 and 995.85 is: 1,493.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.11 : 4,780.67 = 995.85 : x
  2. Step 2: Convert to fraction form
    3,187.11/4,780.67 = 995.85/x
  3. Step 3: Cross multiply
    3,187.11x = 4,780.67 × 995.85
  4. Step 4: Simplify right side
    3,187.11x = 4,760,830.22
  5. Step 5: Solve for x
    x = 4,760,830.22/3,187.11
  6. Step 6: Final answer
    x = 1,493.78

Related Problems

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Double scale
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Similar ratio
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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.