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Finding the Fourth Proportional to 438,842.72, 605,571.24 and 257,561.84

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Solution

The fourth proportional to 438,842.72, 605,571.24 and 257,561.84 is: 355,416.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,842.72 : 605,571.24 = 257,561.84 : x
  2. Step 2: Convert to fraction form
    438,842.72/605,571.24 = 257,561.84/x
  3. Step 3: Cross multiply
    438,842.72x = 605,571.24 × 257,561.84
  4. Step 4: Simplify right side
    438,842.72x = 155,972,042,825.48
  5. Step 5: Solve for x
    x = 155,972,042,825.48/438,842.72
  6. Step 6: Final answer
    x = 355,416.73

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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.