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Finding the Fourth Proportional to 668,793.60, 923,011.20 and 400,521.60

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Solution

The fourth proportional to 668,793.60, 923,011.20 and 400,521.60 is: 552,765.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,793.60 : 923,011.20 = 400,521.60 : x
  2. Step 2: Convert to fraction form
    668,793.60/923,011.20 = 400,521.60/x
  3. Step 3: Cross multiply
    668,793.60x = 923,011.20 × 400,521.60
  4. Step 4: Simplify right side
    668,793.60x = 369,685,922,641.92
  5. Step 5: Solve for x
    x = 369,685,922,641.92/668,793.60
  6. Step 6: Final answer
    x = 552,765.34

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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.