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Finding the Fourth Proportional to 438,990.75, 605,794.83 and 257,699.79

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Solution

The fourth proportional to 438,990.75, 605,794.83 and 257,699.79 is: 355,618.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,990.75 : 605,794.83 = 257,699.79 : x
  2. Step 2: Convert to fraction form
    438,990.75/605,794.83 = 257,699.79/x
  3. Step 3: Cross multiply
    438,990.75x = 605,794.83 × 257,699.79
  4. Step 4: Simplify right side
    438,990.75x = 156,113,200,474.09
  5. Step 5: Solve for x
    x = 156,113,200,474.09/438,990.75
  6. Step 6: Final answer
    x = 355,618.43

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1.5x scale

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.