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Finding the Fourth Proportional to 526,409.40, 789,614.20 and 147,385.96

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Solution

The fourth proportional to 526,409.40, 789,614.20 and 147,385.96 is: 221,078.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,409.40 : 789,614.20 = 147,385.96 : x
  2. Step 2: Convert to fraction form
    526,409.40/789,614.20 = 147,385.96/x
  3. Step 3: Cross multiply
    526,409.40x = 789,614.20 × 147,385.96
  4. Step 4: Simplify right side
    526,409.40x = 116,378,046,896.63
  5. Step 5: Solve for x
    x = 116,378,046,896.63/526,409.40
  6. Step 6: Final answer
    x = 221,078.97

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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.