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Finding the Fourth Proportional to 5,178.94, 7,765.07 and 1,891.76

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Solution

The fourth proportional to 5,178.94, 7,765.07 and 1,891.76 is: 2,836.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.94 : 7,765.07 = 1,891.76 : x
  2. Step 2: Convert to fraction form
    5,178.94/7,765.07 = 1,891.76/x
  3. Step 3: Cross multiply
    5,178.94x = 7,765.07 × 1,891.76
  4. Step 4: Simplify right side
    5,178.94x = 14,689,600.54
  5. Step 5: Solve for x
    x = 14,689,600.54/5,178.94
  6. Step 6: Final answer
    x = 2,836.41

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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.