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Finding the Fourth Proportional to 665,786.96, 998,931.80 and 399,732.92

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Solution

The fourth proportional to 665,786.96, 998,931.80 and 399,732.92 is: 599,750.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,786.96 : 998,931.80 = 399,732.92 : x
  2. Step 2: Convert to fraction form
    665,786.96/998,931.80 = 399,732.92/x
  3. Step 3: Cross multiply
    665,786.96x = 998,931.80 × 399,732.92
  4. Step 4: Simplify right side
    665,786.96x = 399,305,925,294.86
  5. Step 5: Solve for x
    x = 399,305,925,294.86/665,786.96
  6. Step 6: Final answer
    x = 599,750.29

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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.