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Finding the Fourth Proportional to 685,010.58, 945,504.84 and 398,586.24

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Solution

The fourth proportional to 685,010.58, 945,504.84 and 398,586.24 is: 550,159.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,010.58 : 945,504.84 = 398,586.24 : x
  2. Step 2: Convert to fraction form
    685,010.58/945,504.84 = 398,586.24/x
  3. Step 3: Cross multiply
    685,010.58x = 945,504.84 × 398,586.24
  4. Step 4: Simplify right side
    685,010.58x = 376,865,219,077.40
  5. Step 5: Solve for x
    x = 376,865,219,077.40/685,010.58
  6. Step 6: Final answer
    x = 550,159.71

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Double scale
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Similar ratio
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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.