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Finding the Fourth Proportional to 285,992.88, 394,680.72 and 172,793.76

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Solution

The fourth proportional to 285,992.88, 394,680.72 and 172,793.76 is: 238,461.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,992.88 : 394,680.72 = 172,793.76 : x
  2. Step 2: Convert to fraction form
    285,992.88/394,680.72 = 172,793.76/x
  3. Step 3: Cross multiply
    285,992.88x = 394,680.72 × 172,793.76
  4. Step 4: Simplify right side
    285,992.88x = 68,198,365,608.31
  5. Step 5: Solve for x
    x = 68,198,365,608.31/285,992.88
  6. Step 6: Final answer
    x = 238,461.76

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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.