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Finding the Fourth Proportional to 378,076.44, 521,768.70 and 208,310.52

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Solution

The fourth proportional to 378,076.44, 521,768.70 and 208,310.52 is: 287,481.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,076.44 : 521,768.70 = 208,310.52 : x
  2. Step 2: Convert to fraction form
    378,076.44/521,768.70 = 208,310.52/x
  3. Step 3: Cross multiply
    378,076.44x = 521,768.70 × 208,310.52
  4. Step 4: Simplify right side
    378,076.44x = 108,689,909,216.72
  5. Step 5: Solve for x
    x = 108,689,909,216.72/378,076.44
  6. Step 6: Final answer
    x = 287,481.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.