Home / 715,930.14-987,984.39-393,645.66

Finding the Fourth Proportional to 715,930.14, 987,984.39 and 393,645.66

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Solution

The fourth proportional to 715,930.14, 987,984.39 and 393,645.66 is: 543,231.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,930.14 : 987,984.39 = 393,645.66 : x
  2. Step 2: Convert to fraction form
    715,930.14/987,984.39 = 393,645.66/x
  3. Step 3: Cross multiply
    715,930.14x = 987,984.39 × 393,645.66
  4. Step 4: Simplify right side
    715,930.14x = 388,915,767,271.25
  5. Step 5: Solve for x
    x = 388,915,767,271.25/715,930.14
  6. Step 6: Final answer
    x = 543,231.45

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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.