Home / 715,826.97-987,836.31-393,528.78

Finding the Fourth Proportional to 715,826.97, 987,836.31 and 393,528.78

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Solution

The fourth proportional to 715,826.97, 987,836.31 and 393,528.78 is: 543,067.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,826.97 : 987,836.31 = 393,528.78 : x
  2. Step 2: Convert to fraction form
    715,826.97/987,836.31 = 393,528.78/x
  3. Step 3: Cross multiply
    715,826.97x = 987,836.31 × 393,528.78
  4. Step 4: Simplify right side
    715,826.97x = 388,742,017,914.00
  5. Step 5: Solve for x
    x = 388,742,017,914.00/715,826.97
  6. Step 6: Final answer
    x = 543,067.02

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1.5x scale

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.