Home / 715,924.31-987,979.27-393,655.17

Finding the Fourth Proportional to 715,924.31, 987,979.27 and 393,655.17

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Solution

The fourth proportional to 715,924.31, 987,979.27 and 393,655.17 is: 543,246.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,924.31 : 987,979.27 = 393,655.17 : x
  2. Step 2: Convert to fraction form
    715,924.31/987,979.27 = 393,655.17/x
  3. Step 3: Cross multiply
    715,924.31x = 987,979.27 × 393,655.17
  4. Step 4: Simplify right side
    715,924.31x = 388,923,147,488.33
  5. Step 5: Solve for x
    x = 388,923,147,488.33/715,924.31
  6. Step 6: Final answer
    x = 543,246.18

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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.