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Finding the Fourth Proportional to 685,394.76, 945,844.64 and 383,588.76

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Solution

The fourth proportional to 685,394.76, 945,844.64 and 383,588.76 is: 529,352.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,394.76 : 945,844.64 = 383,588.76 : x
  2. Step 2: Convert to fraction form
    685,394.76/945,844.64 = 383,588.76/x
  3. Step 3: Cross multiply
    685,394.76x = 945,844.64 × 383,588.76
  4. Step 4: Simplify right side
    685,394.76x = 362,815,372,610.25
  5. Step 5: Solve for x
    x = 362,815,372,610.25/685,394.76
  6. Step 6: Final answer
    x = 529,352.42

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Half scale
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Double scale
Find fourth proportional to 685,395.76, 945,846.02 and 383,589.76
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.