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Finding the Fourth Proportional to 398,857.65, 551,140.35 and 303,198.27

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Solution

The fourth proportional to 398,857.65, 551,140.35 and 303,198.27 is: 418,958.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,857.65 : 551,140.35 = 303,198.27 : x
  2. Step 2: Convert to fraction form
    398,857.65/551,140.35 = 303,198.27/x
  3. Step 3: Cross multiply
    398,857.65x = 551,140.35 × 303,198.27
  4. Step 4: Simplify right side
    398,857.65x = 167,104,800,647.20
  5. Step 5: Solve for x
    x = 167,104,800,647.20/398,857.65
  6. Step 6: Final answer
    x = 418,958.49

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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.