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Finding the Fourth Proportional to 625,638.15, 938,107.31 and 204,878.79

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Solution

The fourth proportional to 625,638.15, 938,107.31 and 204,878.79 is: 307,203.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,638.15 : 938,107.31 = 204,878.79 : x
  2. Step 2: Convert to fraction form
    625,638.15/938,107.31 = 204,878.79/x
  3. Step 3: Cross multiply
    625,638.15x = 938,107.31 × 204,878.79
  4. Step 4: Simplify right side
    625,638.15x = 192,198,289,538.56
  5. Step 5: Solve for x
    x = 192,198,289,538.56/625,638.15
  6. Step 6: Final answer
    x = 307,203.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.