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Finding the Fourth Proportional to 684,890.78, 945,066.44 and 394,597.30

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Solution

The fourth proportional to 684,890.78, 945,066.44 and 394,597.30 is: 544,496.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,890.78 : 945,066.44 = 394,597.30 : x
  2. Step 2: Convert to fraction form
    684,890.78/945,066.44 = 394,597.30/x
  3. Step 3: Cross multiply
    684,890.78x = 945,066.44 × 394,597.30
  4. Step 4: Simplify right side
    684,890.78x = 372,920,665,544.61
  5. Step 5: Solve for x
    x = 372,920,665,544.61/684,890.78
  6. Step 6: Final answer
    x = 544,496.55

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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.