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Finding the Fourth Proportional to 685,257.64, 945,668.10 and 383,450.92

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Solution

The fourth proportional to 685,257.64, 945,668.10 and 383,450.92 is: 529,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,257.64 : 945,668.10 = 383,450.92 : x
  2. Step 2: Convert to fraction form
    685,257.64/945,668.10 = 383,450.92/x
  3. Step 3: Cross multiply
    685,257.64x = 945,668.10 × 383,450.92
  4. Step 4: Simplify right side
    685,257.64x = 362,617,302,959.65
  5. Step 5: Solve for x
    x = 362,617,302,959.65/685,257.64
  6. Step 6: Final answer
    x = 529,169.30

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Double scale
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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.