Home / 685,120.56-945,387.50-394,774.44

Finding the Fourth Proportional to 685,120.56, 945,387.50 and 394,774.44

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Solution

The fourth proportional to 685,120.56, 945,387.50 and 394,774.44 is: 544,743.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,120.56 : 945,387.50 = 394,774.44 : x
  2. Step 2: Convert to fraction form
    685,120.56/945,387.50 = 394,774.44/x
  3. Step 3: Cross multiply
    685,120.56x = 945,387.50 × 394,774.44
  4. Step 4: Simplify right side
    685,120.56x = 373,214,818,921.63
  5. Step 5: Solve for x
    x = 373,214,818,921.63/685,120.56
  6. Step 6: Final answer
    x = 544,743.28

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Half scale
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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.