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Finding the Fourth Proportional to 3,112.42, 4,668.09 and 803.92

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Solution

The fourth proportional to 3,112.42, 4,668.09 and 803.92 is: 1,205.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,112.42 : 4,668.09 = 803.92 : x
  2. Step 2: Convert to fraction form
    3,112.42/4,668.09 = 803.92/x
  3. Step 3: Cross multiply
    3,112.42x = 4,668.09 × 803.92
  4. Step 4: Simplify right side
    3,112.42x = 3,752,756.23
  5. Step 5: Solve for x
    x = 3,752,756.23/3,112.42
  6. Step 6: Final answer
    x = 1,205.74

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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.