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Finding the Fourth Proportional to 4,791.72, 7,190.85 and 1,869.72

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Solution

The fourth proportional to 4,791.72, 7,190.85 and 1,869.72 is: 2,805.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,791.72 : 7,190.85 = 1,869.72 : x
  2. Step 2: Convert to fraction form
    4,791.72/7,190.85 = 1,869.72/x
  3. Step 3: Cross multiply
    4,791.72x = 7,190.85 × 1,869.72
  4. Step 4: Simplify right side
    4,791.72x = 13,444,876.06
  5. Step 5: Solve for x
    x = 13,444,876.06/4,791.72
  6. Step 6: Final answer
    x = 2,805.86

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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.