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Finding the Fourth Proportional to 438,609.87, 605,286.63 and 257,324.94

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Solution

The fourth proportional to 438,609.87, 605,286.63 and 257,324.94 is: 355,111.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,609.87 : 605,286.63 = 257,324.94 : x
  2. Step 2: Convert to fraction form
    438,609.87/605,286.63 = 257,324.94/x
  3. Step 3: Cross multiply
    438,609.87x = 605,286.63 × 257,324.94
  4. Step 4: Simplify right side
    438,609.87x = 155,755,345,747.55
  5. Step 5: Solve for x
    x = 155,755,345,747.55/438,609.87
  6. Step 6: Final answer
    x = 355,111.36

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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.