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Finding the Fourth Proportional to 3,992.85, 5,988.11 and 1,911.69

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Solution

The fourth proportional to 3,992.85, 5,988.11 and 1,911.69 is: 2,866.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.85 : 5,988.11 = 1,911.69 : x
  2. Step 2: Convert to fraction form
    3,992.85/5,988.11 = 1,911.69/x
  3. Step 3: Cross multiply
    3,992.85x = 5,988.11 × 1,911.69
  4. Step 4: Simplify right side
    3,992.85x = 11,447,400.45
  5. Step 5: Solve for x
    x = 11,447,400.45/3,992.85
  6. Step 6: Final answer
    x = 2,866.97

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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.