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Finding the Fourth Proportional to 331,438.74, 457,388.60 and 188,201.79

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Solution

The fourth proportional to 331,438.74, 457,388.60 and 188,201.79 is: 259,720.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,438.74 : 457,388.60 = 188,201.79 : x
  2. Step 2: Convert to fraction form
    331,438.74/457,388.60 = 188,201.79/x
  3. Step 3: Cross multiply
    331,438.74x = 457,388.60 × 188,201.79
  4. Step 4: Simplify right side
    331,438.74x = 86,081,352,304.59
  5. Step 5: Solve for x
    x = 86,081,352,304.59/331,438.74
  6. Step 6: Final answer
    x = 259,720.25

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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.