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Finding the Fourth Proportional to 3,871.32, 5,806.92 and 949.68

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Solution

The fourth proportional to 3,871.32, 5,806.92 and 949.68 is: 1,424.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.32 : 5,806.92 = 949.68 : x
  2. Step 2: Convert to fraction form
    3,871.32/5,806.92 = 949.68/x
  3. Step 3: Cross multiply
    3,871.32x = 5,806.92 × 949.68
  4. Step 4: Simplify right side
    3,871.32x = 5,514,715.79
  5. Step 5: Solve for x
    x = 5,514,715.79/3,871.32
  6. Step 6: Final answer
    x = 1,424.51

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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.