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Finding the Fourth Proportional to 5,204.69, 7,806.80 and 1,917.56

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Solution

The fourth proportional to 5,204.69, 7,806.80 and 1,917.56 is: 2,876.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,204.69 : 7,806.80 = 1,917.56 : x
  2. Step 2: Convert to fraction form
    5,204.69/7,806.80 = 1,917.56/x
  3. Step 3: Cross multiply
    5,204.69x = 7,806.80 × 1,917.56
  4. Step 4: Simplify right side
    5,204.69x = 14,969,997.82
  5. Step 5: Solve for x
    x = 14,969,997.82/5,204.69
  6. Step 6: Final answer
    x = 2,876.25

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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.