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Finding the Fourth Proportional to 667,279.89, 920,842.02 and 361,351.40

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Solution

The fourth proportional to 667,279.89, 920,842.02 and 361,351.40 is: 498,662.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,279.89 : 920,842.02 = 361,351.40 : x
  2. Step 2: Convert to fraction form
    667,279.89/920,842.02 = 361,351.40/x
  3. Step 3: Cross multiply
    667,279.89x = 920,842.02 × 361,351.40
  4. Step 4: Simplify right side
    667,279.89x = 332,747,548,501.62
  5. Step 5: Solve for x
    x = 332,747,548,501.62/667,279.89
  6. Step 6: Final answer
    x = 498,662.64

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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.