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Finding the Fourth Proportional to 715,848.39, 987,871.41 and 393,563.97

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Solution

The fourth proportional to 715,848.39, 987,871.41 and 393,563.97 is: 543,118.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,848.39 : 987,871.41 = 393,563.97 : x
  2. Step 2: Convert to fraction form
    715,848.39/987,871.41 = 393,563.97/x
  3. Step 3: Cross multiply
    715,848.39x = 987,871.41 × 393,563.97
  4. Step 4: Simplify right side
    715,848.39x = 388,790,593,969.10
  5. Step 5: Solve for x
    x = 388,790,593,969.10/715,848.39
  6. Step 6: Final answer
    x = 543,118.63

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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.