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Finding the Fourth Proportional to 515,519.60, 711,415.51 and 286,111.44

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Solution

The fourth proportional to 515,519.60, 711,415.51 and 286,111.44 is: 394,832.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,519.60 : 711,415.51 = 286,111.44 : x
  2. Step 2: Convert to fraction form
    515,519.60/711,415.51 = 286,111.44/x
  3. Step 3: Cross multiply
    515,519.60x = 711,415.51 × 286,111.44
  4. Step 4: Simplify right side
    515,519.60x = 203,544,115,289.16
  5. Step 5: Solve for x
    x = 203,544,115,289.16/515,519.60
  6. Step 6: Final answer
    x = 394,832.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.