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Finding the Fourth Proportional to 1,279,631, 1,919,441 and 521,303.34

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Solution

The fourth proportional to 1,279,631, 1,919,441 and 521,303.34 is: 781,952.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,631 : 1,919,441 = 521,303.34 : x
  2. Step 2: Convert to fraction form
    1,279,631/1,919,441 = 521,303.34/x
  3. Step 3: Cross multiply
    1,279,631x = 1,919,441 × 521,303.34
  4. Step 4: Simplify right side
    1,279,631x = 1,000,611,004,232.94
  5. Step 5: Solve for x
    x = 1,000,611,004,232.94/1,279,631
  6. Step 6: Final answer
    x = 781,952.77

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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.