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Finding the Fourth Proportional to 5,178.97, 7,764.19 and 1,889.97

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Solution

The fourth proportional to 5,178.97, 7,764.19 and 1,889.97 is: 2,833.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.97 : 7,764.19 = 1,889.97 : x
  2. Step 2: Convert to fraction form
    5,178.97/7,764.19 = 1,889.97/x
  3. Step 3: Cross multiply
    5,178.97x = 7,764.19 × 1,889.97
  4. Step 4: Simplify right side
    5,178.97x = 14,674,052.33
  5. Step 5: Solve for x
    x = 14,674,052.33/5,178.97
  6. Step 6: Final answer
    x = 2,833.39

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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.