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Finding the Fourth Proportional to 665,171.73, 998,005.50 and 399,123.18

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Solution

The fourth proportional to 665,171.73, 998,005.50 and 399,123.18 is: 598,833.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,171.73 : 998,005.50 = 399,123.18 : x
  2. Step 2: Convert to fraction form
    665,171.73/998,005.50 = 399,123.18/x
  3. Step 3: Cross multiply
    665,171.73x = 998,005.50 × 399,123.18
  4. Step 4: Simplify right side
    665,171.73x = 398,327,128,817.49
  5. Step 5: Solve for x
    x = 398,327,128,817.49/665,171.73
  6. Step 6: Final answer
    x = 598,833.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.