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Finding the Fourth Proportional to 4,992.66, 7,479 and 3,231.60

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Solution

The fourth proportional to 4,992.66, 7,479 and 3,231.60 is: 4,840.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992.66 : 7,479 = 3,231.60 : x
  2. Step 2: Convert to fraction form
    4,992.66/7,479 = 3,231.60/x
  3. Step 3: Cross multiply
    4,992.66x = 7,479 × 3,231.60
  4. Step 4: Simplify right side
    4,992.66x = 24,169,136.40
  5. Step 5: Solve for x
    x = 24,169,136.40/4,992.66
  6. Step 6: Final answer
    x = 4,840.93

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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.