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Finding the Fourth Proportional to 520,861.88, 781,370.81 and 188,515.64

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Solution

The fourth proportional to 520,861.88, 781,370.81 and 188,515.64 is: 282,801.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,861.88 : 781,370.81 = 188,515.64 : x
  2. Step 2: Convert to fraction form
    520,861.88/781,370.81 = 188,515.64/x
  3. Step 3: Cross multiply
    520,861.88x = 781,370.81 × 188,515.64
  4. Step 4: Simplify right side
    520,861.88x = 147,300,614,888.90
  5. Step 5: Solve for x
    x = 147,300,614,888.90/520,861.88
  6. Step 6: Final answer
    x = 282,801.68

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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.