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Finding the Fourth Proportional to 711,521.28, 981,952.64 and 405,604.94

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Solution

The fourth proportional to 711,521.28, 981,952.64 and 405,604.94 is: 559,765.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,521.28 : 981,952.64 = 405,604.94 : x
  2. Step 2: Convert to fraction form
    711,521.28/981,952.64 = 405,604.94/x
  3. Step 3: Cross multiply
    711,521.28x = 981,952.64 × 405,604.94
  4. Step 4: Simplify right side
    711,521.28x = 398,284,834,692.25
  5. Step 5: Solve for x
    x = 398,284,834,692.25/711,521.28
  6. Step 6: Final answer
    x = 559,765.18

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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.