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Finding the Fourth Proportional to 499,900.38, 689,845.44 and 285,109.64

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Solution

The fourth proportional to 499,900.38, 689,845.44 and 285,109.64 is: 393,441.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,900.38 : 689,845.44 = 285,109.64 : x
  2. Step 2: Convert to fraction form
    499,900.38/689,845.44 = 285,109.64/x
  3. Step 3: Cross multiply
    499,900.38x = 689,845.44 × 285,109.64
  4. Step 4: Simplify right side
    499,900.38x = 196,681,585,260.90
  5. Step 5: Solve for x
    x = 196,681,585,260.90/499,900.38
  6. Step 6: Final answer
    x = 393,441.56

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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.