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Finding the Fourth Proportional to 5,179.76, 7,769.10 and 1,481.76

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Solution

The fourth proportional to 5,179.76, 7,769.10 and 1,481.76 is: 2,222.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.76 : 7,769.10 = 1,481.76 : x
  2. Step 2: Convert to fraction form
    5,179.76/7,769.10 = 1,481.76/x
  3. Step 3: Cross multiply
    5,179.76x = 7,769.10 × 1,481.76
  4. Step 4: Simplify right side
    5,179.76x = 11,511,941.62
  5. Step 5: Solve for x
    x = 11,511,941.62/5,179.76
  6. Step 6: Final answer
    x = 2,222.49

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1.5x scale

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.