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Finding the Fourth Proportional to 3,212.81, 4,819.22 and 1,021.54

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Solution

The fourth proportional to 3,212.81, 4,819.22 and 1,021.54 is: 1,532.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.81 : 4,819.22 = 1,021.54 : x
  2. Step 2: Convert to fraction form
    3,212.81/4,819.22 = 1,021.54/x
  3. Step 3: Cross multiply
    3,212.81x = 4,819.22 × 1,021.54
  4. Step 4: Simplify right side
    3,212.81x = 4,923,026.00
  5. Step 5: Solve for x
    x = 4,923,026.00/3,212.81
  6. Step 6: Final answer
    x = 1,532.31

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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.