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Finding the Fourth Proportional to 717,786.97, 990,535.43 and 411,856.65

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Solution

The fourth proportional to 717,786.97, 990,535.43 and 411,856.65 is: 568,356.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,786.97 : 990,535.43 = 411,856.65 : x
  2. Step 2: Convert to fraction form
    717,786.97/990,535.43 = 411,856.65/x
  3. Step 3: Cross multiply
    717,786.97x = 990,535.43 × 411,856.65
  4. Step 4: Simplify right side
    717,786.97x = 407,958,604,935.75
  5. Step 5: Solve for x
    x = 407,958,604,935.75/717,786.97
  6. Step 6: Final answer
    x = 568,356.10

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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.