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Finding the Fourth Proportional to 5,192.64, 7,789.86 and 1,908

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Solution

The fourth proportional to 5,192.64, 7,789.86 and 1,908 is: 2,862.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,192.64 : 7,789.86 = 1,908 : x
  2. Step 2: Convert to fraction form
    5,192.64/7,789.86 = 1,908/x
  3. Step 3: Cross multiply
    5,192.64x = 7,789.86 × 1,908
  4. Step 4: Simplify right side
    5,192.64x = 14,863,052.88
  5. Step 5: Solve for x
    x = 14,863,052.88/5,192.64
  6. Step 6: Final answer
    x = 2,862.33

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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.