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Finding the Fourth Proportional to 397,194.53, 548,116.79 and 215,901.80

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Solution

The fourth proportional to 397,194.53, 548,116.79 and 215,901.80 is: 297,938.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,194.53 : 548,116.79 = 215,901.80 : x
  2. Step 2: Convert to fraction form
    397,194.53/548,116.79 = 215,901.80/x
  3. Step 3: Cross multiply
    397,194.53x = 548,116.79 × 215,901.80
  4. Step 4: Simplify right side
    397,194.53x = 118,339,399,370.39
  5. Step 5: Solve for x
    x = 118,339,399,370.39/397,194.53
  6. Step 6: Final answer
    x = 297,938.14

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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.