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Finding the Fourth Proportional to 303,815.31, 418,673.12 and 218,771.79

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Solution

The fourth proportional to 303,815.31, 418,673.12 and 218,771.79 is: 301,478.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,815.31 : 418,673.12 = 218,771.79 : x
  2. Step 2: Convert to fraction form
    303,815.31/418,673.12 = 218,771.79/x
  3. Step 3: Cross multiply
    303,815.31x = 418,673.12 × 218,771.79
  4. Step 4: Simplify right side
    303,815.31x = 91,593,866,793.43
  5. Step 5: Solve for x
    x = 91,593,866,793.43/303,815.31
  6. Step 6: Final answer
    x = 301,478.77

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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.