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Finding the Fourth Proportional to 668,794.16, 917,261.20 and 641,329.21

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Solution

The fourth proportional to 668,794.16, 917,261.20 and 641,329.21 is: 879,592.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,794.16 : 917,261.20 = 641,329.21 : x
  2. Step 2: Convert to fraction form
    668,794.16/917,261.20 = 641,329.21/x
  3. Step 3: Cross multiply
    668,794.16x = 917,261.20 × 641,329.21
  4. Step 4: Simplify right side
    668,794.16x = 588,266,400,759.65
  5. Step 5: Solve for x
    x = 588,266,400,759.65/668,794.16
  6. Step 6: Final answer
    x = 879,592.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.