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Finding the Fourth Proportional to 641,765.16, 885,357.81 and 386,974.80

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Solution

The fourth proportional to 641,765.16, 885,357.81 and 386,974.80 is: 533,857.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,765.16 : 885,357.81 = 386,974.80 : x
  2. Step 2: Convert to fraction form
    641,765.16/885,357.81 = 386,974.80/x
  3. Step 3: Cross multiply
    641,765.16x = 885,357.81 × 386,974.80
  4. Step 4: Simplify right side
    641,765.16x = 342,611,161,453.19
  5. Step 5: Solve for x
    x = 342,611,161,453.19/641,765.16
  6. Step 6: Final answer
    x = 533,857.53

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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.