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Finding the Fourth Proportional to 668,796.16, 917,263.94 and 641,331.21

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Solution

The fourth proportional to 668,796.16, 917,263.94 and 641,331.21 is: 879,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,796.16 : 917,263.94 = 641,331.21 : x
  2. Step 2: Convert to fraction form
    668,796.16/917,263.94 = 641,331.21/x
  3. Step 3: Cross multiply
    668,796.16x = 917,263.94 × 641,331.21
  4. Step 4: Simplify right side
    668,796.16x = 588,269,992,529.57
  5. Step 5: Solve for x
    x = 588,269,992,529.57/668,796.16
  6. Step 6: Final answer
    x = 879,595.35

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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.