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Finding the Fourth Proportional to 515,520.60, 711,416.89 and 286,112.44

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Solution

The fourth proportional to 515,520.60, 711,416.89 and 286,112.44 is: 394,834.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,520.60 : 711,416.89 = 286,112.44 : x
  2. Step 2: Convert to fraction form
    515,520.60/711,416.89 = 286,112.44/x
  3. Step 3: Cross multiply
    515,520.60x = 711,416.89 × 286,112.44
  4. Step 4: Simplify right side
    515,520.60x = 203,545,222,255.11
  5. Step 5: Solve for x
    x = 203,545,222,255.11/515,520.60
  6. Step 6: Final answer
    x = 394,834.31

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1.5x scale

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.