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Finding the Fourth Proportional to 680,011.29, 938,357.73 and 393,549.12

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Solution

The fourth proportional to 680,011.29, 938,357.73 and 393,549.12 is: 543,064.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,011.29 : 938,357.73 = 393,549.12 : x
  2. Step 2: Convert to fraction form
    680,011.29/938,357.73 = 393,549.12/x
  3. Step 3: Cross multiply
    680,011.29x = 938,357.73 × 393,549.12
  4. Step 4: Simplify right side
    680,011.29x = 369,289,858,886.70
  5. Step 5: Solve for x
    x = 369,289,858,886.70/680,011.29
  6. Step 6: Final answer
    x = 543,064.31

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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.