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Finding the Fourth Proportional to 3,185.86, 4,779.28 and 994.12

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Solution

The fourth proportional to 3,185.86, 4,779.28 and 994.12 is: 1,491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185.86 : 4,779.28 = 994.12 : x
  2. Step 2: Convert to fraction form
    3,185.86/4,779.28 = 994.12/x
  3. Step 3: Cross multiply
    3,185.86x = 4,779.28 × 994.12
  4. Step 4: Simplify right side
    3,185.86x = 4,751,177.83
  5. Step 5: Solve for x
    x = 4,751,177.83/3,185.86
  6. Step 6: Final answer
    x = 1,491.33

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,186.86, 4,780.78 and 995.12
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.