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Finding the Fourth Proportional to 500,685.18, 691,009.83 and 285,775.98

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Solution

The fourth proportional to 500,685.18, 691,009.83 and 285,775.98 is: 394,407.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,685.18 : 691,009.83 = 285,775.98 : x
  2. Step 2: Convert to fraction form
    500,685.18/691,009.83 = 285,775.98/x
  3. Step 3: Cross multiply
    500,685.18x = 691,009.83 × 285,775.98
  4. Step 4: Simplify right side
    500,685.18x = 197,474,011,357.88
  5. Step 5: Solve for x
    x = 197,474,011,357.88/500,685.18
  6. Step 6: Final answer
    x = 394,407.54

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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.