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Finding the Fourth Proportional to 515,248.70, 711,054.61 and 285,798.52

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Solution

The fourth proportional to 515,248.70, 711,054.61 and 285,798.52 is: 394,408.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,248.70 : 711,054.61 = 285,798.52 : x
  2. Step 2: Convert to fraction form
    515,248.70/711,054.61 = 285,798.52/x
  3. Step 3: Cross multiply
    515,248.70x = 711,054.61 × 285,798.52
  4. Step 4: Simplify right side
    515,248.70x = 203,218,352,685.04
  5. Step 5: Solve for x
    x = 203,218,352,685.04/515,248.70
  6. Step 6: Final answer
    x = 394,408.28

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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.