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Finding the Fourth Proportional to 668,911.75, 923,098.23 and 400,639.75

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Solution

The fourth proportional to 668,911.75, 923,098.23 and 400,639.75 is: 552,882.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,911.75 : 923,098.23 = 400,639.75 : x
  2. Step 2: Convert to fraction form
    668,911.75/923,098.23 = 400,639.75/x
  3. Step 3: Cross multiply
    668,911.75x = 923,098.23 × 400,639.75
  4. Step 4: Simplify right side
    668,911.75x = 369,829,844,092.64
  5. Step 5: Solve for x
    x = 369,829,844,092.64/668,911.75
  6. Step 6: Final answer
    x = 552,882.86

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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.