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Finding the Fourth Proportional to 412,254.70, 621,190.13 and 339,015.34

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Solution

The fourth proportional to 412,254.70, 621,190.13 and 339,015.34 is: 510,832.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,254.70 : 621,190.13 = 339,015.34 : x
  2. Step 2: Convert to fraction form
    412,254.70/621,190.13 = 339,015.34/x
  3. Step 3: Cross multiply
    412,254.70x = 621,190.13 × 339,015.34
  4. Step 4: Simplify right side
    412,254.70x = 210,592,978,325.57
  5. Step 5: Solve for x
    x = 210,592,978,325.57/412,254.70
  6. Step 6: Final answer
    x = 510,832.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.