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Finding the Fourth Proportional to 2,992.16, 4,488.08 and 911.99

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Solution

The fourth proportional to 2,992.16, 4,488.08 and 911.99 is: 1,367.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,992.16 : 4,488.08 = 911.99 : x
  2. Step 2: Convert to fraction form
    2,992.16/4,488.08 = 911.99/x
  3. Step 3: Cross multiply
    2,992.16x = 4,488.08 × 911.99
  4. Step 4: Simplify right side
    2,992.16x = 4,093,083.20
  5. Step 5: Solve for x
    x = 4,093,083.20/2,992.16
  6. Step 6: Final answer
    x = 1,367.94

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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.