Home / 715,864.97-987,900.30-393,577.31

Finding the Fourth Proportional to 715,864.97, 987,900.30 and 393,577.31

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Solution

The fourth proportional to 715,864.97, 987,900.30 and 393,577.31 is: 543,140.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,864.97 : 987,900.30 = 393,577.31 : x
  2. Step 2: Convert to fraction form
    715,864.97/987,900.30 = 393,577.31/x
  3. Step 3: Cross multiply
    715,864.97x = 987,900.30 × 393,577.31
  4. Step 4: Simplify right side
    715,864.97x = 388,815,145,091.94
  5. Step 5: Solve for x
    x = 388,815,145,091.94/715,864.97
  6. Step 6: Final answer
    x = 543,140.34

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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.