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Finding the Fourth Proportional to 619,853.36, 855,331.92 and 347,951.21

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Solution

The fourth proportional to 619,853.36, 855,331.92 and 347,951.21 is: 480,135.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,853.36 : 855,331.92 = 347,951.21 : x
  2. Step 2: Convert to fraction form
    619,853.36/855,331.92 = 347,951.21/x
  3. Step 3: Cross multiply
    619,853.36x = 855,331.92 × 347,951.21
  4. Step 4: Simplify right side
    619,853.36x = 297,613,772,238.96
  5. Step 5: Solve for x
    x = 297,613,772,238.96/619,853.36
  6. Step 6: Final answer
    x = 480,135.78

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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.