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Finding the Fourth Proportional to 630,449.11, 945,103.83 and 428,112.73

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Solution

The fourth proportional to 630,449.11, 945,103.83 and 428,112.73 is: 641,782.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,449.11 : 945,103.83 = 428,112.73 : x
  2. Step 2: Convert to fraction form
    630,449.11/945,103.83 = 428,112.73/x
  3. Step 3: Cross multiply
    630,449.11x = 945,103.83 × 428,112.73
  4. Step 4: Simplify right side
    630,449.11x = 404,610,980,794.76
  5. Step 5: Solve for x
    x = 404,610,980,794.76/630,449.11
  6. Step 6: Final answer
    x = 641,782.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.