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Finding the Fourth Proportional to 412,289.76, 618,522.84 and 127,974.10

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Solution

The fourth proportional to 412,289.76, 618,522.84 and 127,974.10 is: 191,988.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,289.76 : 618,522.84 = 127,974.10 : x
  2. Step 2: Convert to fraction form
    412,289.76/618,522.84 = 127,974.10/x
  3. Step 3: Cross multiply
    412,289.76x = 618,522.84 × 127,974.10
  4. Step 4: Simplify right side
    412,289.76x = 79,154,903,778.44
  5. Step 5: Solve for x
    x = 79,154,903,778.44/412,289.76
  6. Step 6: Final answer
    x = 191,988.53

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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.