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Finding the Fourth Proportional to 397,169.78, 548,097.60 and 215,881.68

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Solution

The fourth proportional to 397,169.78, 548,097.60 and 215,881.68 is: 297,918.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,169.78 : 548,097.60 = 215,881.68 : x
  2. Step 2: Convert to fraction form
    397,169.78/548,097.60 = 215,881.68/x
  3. Step 3: Cross multiply
    397,169.78x = 548,097.60 × 215,881.68
  4. Step 4: Simplify right side
    397,169.78x = 118,324,227,951.48
  5. Step 5: Solve for x
    x = 118,324,227,951.48/397,169.78
  6. Step 6: Final answer
    x = 297,918.51

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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.