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Finding the Fourth Proportional to 624,619.92, 861,657.36 and 379,538.64

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Solution

The fourth proportional to 624,619.92, 861,657.36 and 379,538.64 is: 523,570.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,619.92 : 861,657.36 = 379,538.64 : x
  2. Step 2: Convert to fraction form
    624,619.92/861,657.36 = 379,538.64/x
  3. Step 3: Cross multiply
    624,619.92x = 861,657.36 × 379,538.64
  4. Step 4: Simplify right side
    624,619.92x = 327,032,262,560.39
  5. Step 5: Solve for x
    x = 327,032,262,560.39/624,619.92
  6. Step 6: Final answer
    x = 523,570.02

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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.