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Finding the Fourth Proportional to 4,789.68, 7,179.36 and 1,668.48

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Solution

The fourth proportional to 4,789.68, 7,179.36 and 1,668.48 is: 2,500.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,789.68 : 7,179.36 = 1,668.48 : x
  2. Step 2: Convert to fraction form
    4,789.68/7,179.36 = 1,668.48/x
  3. Step 3: Cross multiply
    4,789.68x = 7,179.36 × 1,668.48
  4. Step 4: Simplify right side
    4,789.68x = 11,978,618.57
  5. Step 5: Solve for x
    x = 11,978,618.57/4,789.68
  6. Step 6: Final answer
    x = 2,500.92

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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.