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Finding the Fourth Proportional to 650,859.40, 976,289.10 and 415,246.60

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Solution

The fourth proportional to 650,859.40, 976,289.10 and 415,246.60 is: 622,869.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    650,859.40 : 976,289.10 = 415,246.60 : x
  2. Step 2: Convert to fraction form
    650,859.40/976,289.10 = 415,246.60/x
  3. Step 3: Cross multiply
    650,859.40x = 976,289.10 × 415,246.60
  4. Step 4: Simplify right side
    650,859.40x = 405,400,729,392.06
  5. Step 5: Solve for x
    x = 405,400,729,392.06/650,859.40
  6. Step 6: Final answer
    x = 622,869.90

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.