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Finding the Fourth Proportional to 666,844.24, 920,251.20 and 394,927.60

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Solution

The fourth proportional to 666,844.24, 920,251.20 and 394,927.60 is: 545,003.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,844.24 : 920,251.20 = 394,927.60 : x
  2. Step 2: Convert to fraction form
    666,844.24/920,251.20 = 394,927.60/x
  3. Step 3: Cross multiply
    666,844.24x = 920,251.20 × 394,927.60
  4. Step 4: Simplify right side
    666,844.24x = 363,432,597,813.12
  5. Step 5: Solve for x
    x = 363,432,597,813.12/666,844.24
  6. Step 6: Final answer
    x = 545,003.73

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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.