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Finding the Fourth Proportional to 715,882.98, 987,893.28 and 393,590.58

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Solution

The fourth proportional to 715,882.98, 987,893.28 and 393,590.58 is: 543,141.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,882.98 : 987,893.28 = 393,590.58 : x
  2. Step 2: Convert to fraction form
    715,882.98/987,893.28 = 393,590.58/x
  3. Step 3: Cross multiply
    715,882.98x = 987,893.28 × 393,590.58
  4. Step 4: Simplify right side
    715,882.98x = 388,825,489,053.30
  5. Step 5: Solve for x
    x = 388,825,489,053.30/715,882.98
  6. Step 6: Final answer
    x = 543,141.13

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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.