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Finding the Fourth Proportional to 685,161.66, 945,498.96 and 379,238.64

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Solution

The fourth proportional to 685,161.66, 945,498.96 and 379,238.64 is: 523,335.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,161.66 : 945,498.96 = 379,238.64 : x
  2. Step 2: Convert to fraction form
    685,161.66/945,498.96 = 379,238.64/x
  3. Step 3: Cross multiply
    685,161.66x = 945,498.96 × 379,238.64
  4. Step 4: Simplify right side
    685,161.66x = 358,569,736,166.19
  5. Step 5: Solve for x
    x = 358,569,736,166.19/685,161.66
  6. Step 6: Final answer
    x = 523,335.96

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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.