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Finding the Fourth Proportional to 627,411.69, 865,825.85 and 355,531.54

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Solution

The fourth proportional to 627,411.69, 865,825.85 and 355,531.54 is: 490,632.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,411.69 : 865,825.85 = 355,531.54 : x
  2. Step 2: Convert to fraction form
    627,411.69/865,825.85 = 355,531.54/x
  3. Step 3: Cross multiply
    627,411.69x = 865,825.85 × 355,531.54
  4. Step 4: Simplify right side
    627,411.69x = 307,828,396,044.65
  5. Step 5: Solve for x
    x = 307,828,396,044.65/627,411.69
  6. Step 6: Final answer
    x = 490,632.23

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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.