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Finding the Fourth Proportional to 323,812.20, 485,135.10 and 199,007.40

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Solution

The fourth proportional to 323,812.20, 485,135.10 and 199,007.40 is: 298,152.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,812.20 : 485,135.10 = 199,007.40 : x
  2. Step 2: Convert to fraction form
    323,812.20/485,135.10 = 199,007.40/x
  3. Step 3: Cross multiply
    323,812.20x = 485,135.10 × 199,007.40
  4. Step 4: Simplify right side
    323,812.20x = 96,545,474,899.74
  5. Step 5: Solve for x
    x = 96,545,474,899.74/323,812.20
  6. Step 6: Final answer
    x = 298,152.68

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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.