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Finding the Fourth Proportional to 397,190.36, 548,123.69 and 215,901.97

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Solution

The fourth proportional to 397,190.36, 548,123.69 and 215,901.97 is: 297,945.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,190.36 : 548,123.69 = 215,901.97 : x
  2. Step 2: Convert to fraction form
    397,190.36/548,123.69 = 215,901.97/x
  3. Step 3: Cross multiply
    397,190.36x = 548,123.69 × 215,901.97
  4. Step 4: Simplify right side
    397,190.36x = 118,340,984,474.67
  5. Step 5: Solve for x
    x = 118,340,984,474.67/397,190.36
  6. Step 6: Final answer
    x = 297,945.26

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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.