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Finding the Fourth Proportional to 638,993.82, 881,813.95 and 348,611.91

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Solution

The fourth proportional to 638,993.82, 881,813.95 and 348,611.91 is: 481,085.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,993.82 : 881,813.95 = 348,611.91 : x
  2. Step 2: Convert to fraction form
    638,993.82/881,813.95 = 348,611.91/x
  3. Step 3: Cross multiply
    638,993.82x = 881,813.95 × 348,611.91
  4. Step 4: Simplify right side
    638,993.82x = 307,410,839,222.02
  5. Step 5: Solve for x
    x = 307,410,839,222.02/638,993.82
  6. Step 6: Final answer
    x = 481,085.78

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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.