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Finding the Fourth Proportional to 279,680.90, 385,808.01 and 166,481.78

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Solution

The fourth proportional to 279,680.90, 385,808.01 and 166,481.78 is: 229,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,680.90 : 385,808.01 = 166,481.78 : x
  2. Step 2: Convert to fraction form
    279,680.90/385,808.01 = 166,481.78/x
  3. Step 3: Cross multiply
    279,680.90x = 385,808.01 × 166,481.78
  4. Step 4: Simplify right side
    279,680.90x = 64,230,004,243.06
  5. Step 5: Solve for x
    x = 64,230,004,243.06/279,680.90
  6. Step 6: Final answer
    x = 229,654.60

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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.