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Finding the Fourth Proportional to 668,792.16, 917,258.46 and 641,327.21

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Solution

The fourth proportional to 668,792.16, 917,258.46 and 641,327.21 is: 879,589.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,792.16 : 917,258.46 = 641,327.21 : x
  2. Step 2: Convert to fraction form
    668,792.16/917,258.46 = 641,327.21/x
  3. Step 3: Cross multiply
    668,792.16x = 917,258.46 × 641,327.21
  4. Step 4: Simplify right side
    668,792.16x = 588,262,809,000.70
  5. Step 5: Solve for x
    x = 588,262,809,000.70/668,792.16
  6. Step 6: Final answer
    x = 879,589.87

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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.