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Finding the Fourth Proportional to 438,668.87, 605,367.21 and 257,383.88

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Solution

The fourth proportional to 438,668.87, 605,367.21 and 257,383.88 is: 355,192.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,668.87 : 605,367.21 = 257,383.88 : x
  2. Step 2: Convert to fraction form
    438,668.87/605,367.21 = 257,383.88/x
  3. Step 3: Cross multiply
    438,668.87x = 605,367.21 × 257,383.88
  4. Step 4: Simplify right side
    438,668.87x = 155,811,761,334.58
  5. Step 5: Solve for x
    x = 155,811,761,334.58/438,668.87
  6. Step 6: Final answer
    x = 355,192.20

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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.