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Finding the Fourth Proportional to 3,212.75, 4,819.88 and 1,021.48

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Solution

The fourth proportional to 3,212.75, 4,819.88 and 1,021.48 is: 1,532.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.75 : 4,819.88 = 1,021.48 : x
  2. Step 2: Convert to fraction form
    3,212.75/4,819.88 = 1,021.48/x
  3. Step 3: Cross multiply
    3,212.75x = 4,819.88 × 1,021.48
  4. Step 4: Simplify right side
    3,212.75x = 4,923,386.92
  5. Step 5: Solve for x
    x = 4,923,386.92/3,212.75
  6. Step 6: Final answer
    x = 1,532.45

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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.