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Finding the Fourth Proportional to 3,186.33, 4,778.68 and 993.93

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Solution

The fourth proportional to 3,186.33, 4,778.68 and 993.93 is: 1,490.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.33 : 4,778.68 = 993.93 : x
  2. Step 2: Convert to fraction form
    3,186.33/4,778.68 = 993.93/x
  3. Step 3: Cross multiply
    3,186.33x = 4,778.68 × 993.93
  4. Step 4: Simplify right side
    3,186.33x = 4,749,673.41
  5. Step 5: Solve for x
    x = 4,749,673.41/3,186.33
  6. Step 6: Final answer
    x = 1,490.64

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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.