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Finding the Fourth Proportional to 412,939.60, 619,409.40 and 147,000.40

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Solution

The fourth proportional to 412,939.60, 619,409.40 and 147,000.40 is: 220,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,939.60 : 619,409.40 = 147,000.40 : x
  2. Step 2: Convert to fraction form
    412,939.60/619,409.40 = 147,000.40/x
  3. Step 3: Cross multiply
    412,939.60x = 619,409.40 × 147,000.40
  4. Step 4: Simplify right side
    412,939.60x = 91,053,429,563.76
  5. Step 5: Solve for x
    x = 91,053,429,563.76/412,939.60
  6. Step 6: Final answer
    x = 220,500.60

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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.