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Finding the Fourth Proportional to 3,866.40, 5,806.71 and 2,018.76

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Solution

The fourth proportional to 3,866.40, 5,806.71 and 2,018.76 is: 3,031.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.40 : 5,806.71 = 2,018.76 : x
  2. Step 2: Convert to fraction form
    3,866.40/5,806.71 = 2,018.76/x
  3. Step 3: Cross multiply
    3,866.40x = 5,806.71 × 2,018.76
  4. Step 4: Simplify right side
    3,866.40x = 11,722,353.88
  5. Step 5: Solve for x
    x = 11,722,353.88/3,866.40
  6. Step 6: Final answer
    x = 3,031.85

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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.