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Finding the Fourth Proportional to 5,279.62, 7,919.76 and 1,769.47

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Solution

The fourth proportional to 5,279.62, 7,919.76 and 1,769.47 is: 2,654.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.62 : 7,919.76 = 1,769.47 : x
  2. Step 2: Convert to fraction form
    5,279.62/7,919.76 = 1,769.47/x
  3. Step 3: Cross multiply
    5,279.62x = 7,919.76 × 1,769.47
  4. Step 4: Simplify right side
    5,279.62x = 14,013,777.73
  5. Step 5: Solve for x
    x = 14,013,777.73/5,279.62
  6. Step 6: Final answer
    x = 2,654.32

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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.