Home / 715,884.77-987,940.04-393,603.18

Finding the Fourth Proportional to 715,884.77, 987,940.04 and 393,603.18

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Solution

The fourth proportional to 715,884.77, 987,940.04 and 393,603.18 is: 543,182.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,884.77 : 987,940.04 = 393,603.18 : x
  2. Step 2: Convert to fraction form
    715,884.77/987,940.04 = 393,603.18/x
  3. Step 3: Cross multiply
    715,884.77x = 987,940.04 × 393,603.18
  4. Step 4: Simplify right side
    715,884.77x = 388,856,339,425.31
  5. Step 5: Solve for x
    x = 388,856,339,425.31/715,884.77
  6. Step 6: Final answer
    x = 543,182.87

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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.