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Finding the Fourth Proportional to 1,318,895.70, 1,978,999.65 and 520,203.30

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Solution

The fourth proportional to 1,318,895.70, 1,978,999.65 and 520,203.30 is: 780,563.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,895.70 : 1,978,999.65 = 520,203.30 : x
  2. Step 2: Convert to fraction form
    1,318,895.70/1,978,999.65 = 520,203.30/x
  3. Step 3: Cross multiply
    1,318,895.70x = 1,978,999.65 × 520,203.30
  4. Step 4: Simplify right side
    1,318,895.70x = 1,029,482,148,628.85
  5. Step 5: Solve for x
    x = 1,029,482,148,628.85/1,318,895.70
  6. Step 6: Final answer
    x = 780,563.73

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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.