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Finding the Fourth Proportional to 621,364.20, 857,513.52 and 349,517.64

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Solution

The fourth proportional to 621,364.20, 857,513.52 and 349,517.64 is: 482,351.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,364.20 : 857,513.52 = 349,517.64 : x
  2. Step 2: Convert to fraction form
    621,364.20/857,513.52 = 349,517.64/x
  3. Step 3: Cross multiply
    621,364.20x = 857,513.52 × 349,517.64
  4. Step 4: Simplify right side
    621,364.20x = 299,716,101,778.49
  5. Step 5: Solve for x
    x = 299,716,101,778.49/621,364.20
  6. Step 6: Final answer
    x = 482,351.74

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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.