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Finding the Fourth Proportional to 638,568.66, 881,162.46 and 393,515.31

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Solution

The fourth proportional to 638,568.66, 881,162.46 and 393,515.31 is: 543,012.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,568.66 : 881,162.46 = 393,515.31 : x
  2. Step 2: Convert to fraction form
    638,568.66/881,162.46 = 393,515.31/x
  3. Step 3: Cross multiply
    638,568.66x = 881,162.46 × 393,515.31
  4. Step 4: Simplify right side
    638,568.66x = 346,750,918,607.26
  5. Step 5: Solve for x
    x = 346,750,918,607.26/638,568.66
  6. Step 6: Final answer
    x = 543,012.74

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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.