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Finding the Fourth Proportional to 1,992.11, 2,988.76 and 805.54

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Solution

The fourth proportional to 1,992.11, 2,988.76 and 805.54 is: 1,208.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.11 : 2,988.76 = 805.54 : x
  2. Step 2: Convert to fraction form
    1,992.11/2,988.76 = 805.54/x
  3. Step 3: Cross multiply
    1,992.11x = 2,988.76 × 805.54
  4. Step 4: Simplify right side
    1,992.11x = 2,407,565.73
  5. Step 5: Solve for x
    x = 2,407,565.73/1,992.11
  6. Step 6: Final answer
    x = 1,208.55

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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.