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Finding the Fourth Proportional to 520,861.13, 781,369.69 and 188,514.89

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Solution

The fourth proportional to 520,861.13, 781,369.69 and 188,514.89 is: 282,800.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,861.13 : 781,369.69 = 188,514.89 : x
  2. Step 2: Convert to fraction form
    520,861.13/781,369.69 = 188,514.89/x
  3. Step 3: Cross multiply
    520,861.13x = 781,369.69 × 188,514.89
  4. Step 4: Simplify right side
    520,861.13x = 147,299,817,252.84
  5. Step 5: Solve for x
    x = 147,299,817,252.84/520,861.13
  6. Step 6: Final answer
    x = 282,800.56

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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.