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Finding the Fourth Proportional to 711,352.02, 981,651.96 and 389,061.12

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Solution

The fourth proportional to 711,352.02, 981,651.96 and 389,061.12 is: 536,896.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,352.02 : 981,651.96 = 389,061.12 : x
  2. Step 2: Convert to fraction form
    711,352.02/981,651.96 = 389,061.12/x
  3. Step 3: Cross multiply
    711,352.02x = 981,651.96 × 389,061.12
  4. Step 4: Simplify right side
    711,352.02x = 381,922,611,007.80
  5. Step 5: Solve for x
    x = 381,922,611,007.80/711,352.02
  6. Step 6: Final answer
    x = 536,896.78

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Double scale
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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.