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Finding the Fourth Proportional to 279,919, 386,338.85 and 165,190.60

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Solution

The fourth proportional to 279,919, 386,338.85 and 165,190.60 is: 227,992.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,919 : 386,338.85 = 165,190.60 : x
  2. Step 2: Convert to fraction form
    279,919/386,338.85 = 165,190.60/x
  3. Step 3: Cross multiply
    279,919x = 386,338.85 × 165,190.60
  4. Step 4: Simplify right side
    279,919x = 63,819,546,434.81
  5. Step 5: Solve for x
    x = 63,819,546,434.81/279,919
  6. Step 6: Final answer
    x = 227,992.91

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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.