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Finding the Fourth Proportional to 3,208.78, 4,811.19 and 1,260.10

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Solution

The fourth proportional to 3,208.78, 4,811.19 and 1,260.10 is: 1,889.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.78 : 4,811.19 = 1,260.10 : x
  2. Step 2: Convert to fraction form
    3,208.78/4,811.19 = 1,260.10/x
  3. Step 3: Cross multiply
    3,208.78x = 4,811.19 × 1,260.10
  4. Step 4: Simplify right side
    3,208.78x = 6,062,580.52
  5. Step 5: Solve for x
    x = 6,062,580.52/3,208.78
  6. Step 6: Final answer
    x = 1,889.37

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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.