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Finding the Fourth Proportional to 515,279.86, 711,061.19 and 285,846.28

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Solution

The fourth proportional to 515,279.86, 711,061.19 and 285,846.28 is: 394,453.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,279.86 : 711,061.19 = 285,846.28 : x
  2. Step 2: Convert to fraction form
    515,279.86/711,061.19 = 285,846.28/x
  3. Step 3: Cross multiply
    515,279.86x = 711,061.19 × 285,846.28
  4. Step 4: Simplify right side
    515,279.86x = 203,254,196,013.87
  5. Step 5: Solve for x
    x = 203,254,196,013.87/515,279.86
  6. Step 6: Final answer
    x = 394,453.99

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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.