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Finding the Fourth Proportional to 687,804.60, 949,199.99 and 381,881.00

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Solution

The fourth proportional to 687,804.60, 949,199.99 and 381,881.00 is: 527,012.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,804.60 : 949,199.99 = 381,881.00 : x
  2. Step 2: Convert to fraction form
    687,804.60/949,199.99 = 381,881.00/x
  3. Step 3: Cross multiply
    687,804.60x = 949,199.99 × 381,881.00
  4. Step 4: Simplify right side
    687,804.60x = 362,481,439,727.66
  5. Step 5: Solve for x
    x = 362,481,439,727.66/687,804.60
  6. Step 6: Final answer
    x = 527,012.23

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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.