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Finding the Fourth Proportional to 711,383.63, 981,732.78 and 389,093.73

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Solution

The fourth proportional to 711,383.63, 981,732.78 and 389,093.73 is: 536,962.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,383.63 : 981,732.78 = 389,093.73 : x
  2. Step 2: Convert to fraction form
    711,383.63/981,732.78 = 389,093.73/x
  3. Step 3: Cross multiply
    711,383.63x = 981,732.78 × 389,093.73
  4. Step 4: Simplify right side
    711,383.63x = 381,986,067,288.00
  5. Step 5: Solve for x
    x = 381,986,067,288.00/711,383.63
  6. Step 6: Final answer
    x = 536,962.13

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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.