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Finding the Fourth Proportional to 3,212.92, 4,819.37 and 872.93

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Solution

The fourth proportional to 3,212.92, 4,819.37 and 872.93 is: 1,309.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,212.92 : 4,819.37 = 872.93 : x
  2. Step 2: Convert to fraction form
    3,212.92/4,819.37 = 872.93/x
  3. Step 3: Cross multiply
    3,212.92x = 4,819.37 × 872.93
  4. Step 4: Simplify right side
    3,212.92x = 4,206,960.59
  5. Step 5: Solve for x
    x = 4,206,960.59/3,212.92
  6. Step 6: Final answer
    x = 1,309.39

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1.5x scale

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.