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Finding the Fourth Proportional to 398,857.73, 551,140.48 and 303,198.35

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Solution

The fourth proportional to 398,857.73, 551,140.48 and 303,198.35 is: 418,958.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,857.73 : 551,140.48 = 303,198.35 : x
  2. Step 2: Convert to fraction form
    398,857.73/551,140.48 = 303,198.35/x
  3. Step 3: Cross multiply
    398,857.73x = 551,140.48 × 303,198.35
  4. Step 4: Simplify right side
    398,857.73x = 167,104,884,154.21
  5. Step 5: Solve for x
    x = 167,104,884,154.21/398,857.73
  6. Step 6: Final answer
    x = 418,958.62

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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.