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Finding the Fourth Proportional to 684,883.77, 945,056.79 and 394,590.30

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Solution

The fourth proportional to 684,883.77, 945,056.79 and 394,590.30 is: 544,486.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,883.77 : 945,056.79 = 394,590.30 : x
  2. Step 2: Convert to fraction form
    684,883.77/945,056.79 = 394,590.30/x
  3. Step 3: Cross multiply
    684,883.77x = 945,056.79 × 394,590.30
  4. Step 4: Simplify right side
    684,883.77x = 372,910,242,283.14
  5. Step 5: Solve for x
    x = 372,910,242,283.14/684,883.77
  6. Step 6: Final answer
    x = 544,486.90

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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.