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Finding the Fourth Proportional to 397,143.52, 548,063.60 and 215,855.39

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Solution

The fourth proportional to 397,143.52, 548,063.60 and 215,855.39 is: 297,883.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,143.52 : 548,063.60 = 215,855.39 : x
  2. Step 2: Convert to fraction form
    397,143.52/548,063.60 = 215,855.39/x
  3. Step 3: Cross multiply
    397,143.52x = 548,063.60 × 215,855.39
  4. Step 4: Simplify right side
    397,143.52x = 118,302,481,043.53
  5. Step 5: Solve for x
    x = 118,302,481,043.53/397,143.52
  6. Step 6: Final answer
    x = 297,883.45

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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.