Home / 715,849.39-987,872.79-393,564.97

Finding the Fourth Proportional to 715,849.39, 987,872.79 and 393,564.97

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Solution

The fourth proportional to 715,849.39, 987,872.79 and 393,564.97 is: 543,120.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,849.39 : 987,872.79 = 393,564.97 : x
  2. Step 2: Convert to fraction form
    715,849.39/987,872.79 = 393,564.97/x
  3. Step 3: Cross multiply
    715,849.39x = 987,872.79 × 393,564.97
  4. Step 4: Simplify right side
    715,849.39x = 388,792,124,960.17
  5. Step 5: Solve for x
    x = 388,792,124,960.17/715,849.39
  6. Step 6: Final answer
    x = 543,120.01

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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.