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Finding the Fourth Proportional to 701,336, 967,843.68 and 399,530

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Solution

The fourth proportional to 701,336, 967,843.68 and 399,530 is: 551,351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    701,336 : 967,843.68 = 399,530 : x
  2. Step 2: Convert to fraction form
    701,336/967,843.68 = 399,530/x
  3. Step 3: Cross multiply
    701,336x = 967,843.68 × 399,530
  4. Step 4: Simplify right side
    701,336x = 386,682,585,470.40
  5. Step 5: Solve for x
    x = 386,682,585,470.40/701,336
  6. Step 6: Final answer
    x = 551,351.40

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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.