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Finding the Fourth Proportional to 621,105.39, 857,155.85 and 349,258.86

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Solution

The fourth proportional to 621,105.39, 857,155.85 and 349,258.86 is: 481,994.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,105.39 : 857,155.85 = 349,258.86 : x
  2. Step 2: Convert to fraction form
    621,105.39/857,155.85 = 349,258.86/x
  3. Step 3: Cross multiply
    621,105.39x = 857,155.85 × 349,258.86
  4. Step 4: Simplify right side
    621,105.39x = 299,369,273,267.04
  5. Step 5: Solve for x
    x = 299,369,273,267.04/621,105.39
  6. Step 6: Final answer
    x = 481,994.33

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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.