Home / 715,935.66-987,964.64-393,626.58

Finding the Fourth Proportional to 715,935.66, 987,964.64 and 393,626.58

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Solution

The fourth proportional to 715,935.66, 987,964.64 and 393,626.58 is: 543,190.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,935.66 : 987,964.64 = 393,626.58 : x
  2. Step 2: Convert to fraction form
    715,935.66/987,964.64 = 393,626.58/x
  3. Step 3: Cross multiply
    715,935.66x = 987,964.64 × 393,626.58
  4. Step 4: Simplify right side
    715,935.66x = 388,889,142,404.13
  5. Step 5: Solve for x
    x = 388,889,142,404.13/715,935.66
  6. Step 6: Final answer
    x = 543,190.07

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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.