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Finding the Fourth Proportional to 412,173.45, 618,348.43 and 127,857.85

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Solution

The fourth proportional to 412,173.45, 618,348.43 and 127,857.85 is: 191,814.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,173.45 : 618,348.43 = 127,857.85 : x
  2. Step 2: Convert to fraction form
    412,173.45/618,348.43 = 127,857.85/x
  3. Step 3: Cross multiply
    412,173.45x = 618,348.43 × 127,857.85
  4. Step 4: Simplify right side
    412,173.45x = 79,060,699,424.63
  5. Step 5: Solve for x
    x = 79,060,699,424.63/412,173.45
  6. Step 6: Final answer
    x = 191,814.15

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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.