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Finding the Fourth Proportional to 379,631, 523,845.30 and 209,842.04

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Solution

The fourth proportional to 379,631, 523,845.30 and 209,842.04 is: 289,556.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,631 : 523,845.30 = 209,842.04 : x
  2. Step 2: Convert to fraction form
    379,631/523,845.30 = 209,842.04/x
  3. Step 3: Cross multiply
    379,631x = 523,845.30 × 209,842.04
  4. Step 4: Simplify right side
    379,631x = 109,924,766,396.41
  5. Step 5: Solve for x
    x = 109,924,766,396.41/379,631
  6. Step 6: Final answer
    x = 289,556.88

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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.