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Finding the Fourth Proportional to 4,979.81, 7,469.71 and 1,859.69

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Solution

The fourth proportional to 4,979.81, 7,469.71 and 1,859.69 is: 2,789.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.81 : 7,469.71 = 1,859.69 : x
  2. Step 2: Convert to fraction form
    4,979.81/7,469.71 = 1,859.69/x
  3. Step 3: Cross multiply
    4,979.81x = 7,469.71 × 1,859.69
  4. Step 4: Simplify right side
    4,979.81x = 13,891,344.99
  5. Step 5: Solve for x
    x = 13,891,344.99/4,979.81
  6. Step 6: Final answer
    x = 2,789.53

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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.