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Finding the Fourth Proportional to 5,192.98, 7,789.21 and 1,905.86

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Solution

The fourth proportional to 5,192.98, 7,789.21 and 1,905.86 is: 2,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,192.98 : 7,789.21 = 1,905.86 : x
  2. Step 2: Convert to fraction form
    5,192.98/7,789.21 = 1,905.86/x
  3. Step 3: Cross multiply
    5,192.98x = 7,789.21 × 1,905.86
  4. Step 4: Simplify right side
    5,192.98x = 14,845,169.20
  5. Step 5: Solve for x
    x = 14,845,169.20/5,192.98
  6. Step 6: Final answer
    x = 2,858.70

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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.