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Finding the Fourth Proportional to 619,709.20, 855,003.72 and 347,737.12

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Solution

The fourth proportional to 619,709.20, 855,003.72 and 347,737.12 is: 479,767.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,709.20 : 855,003.72 = 347,737.12 : x
  2. Step 2: Convert to fraction form
    619,709.20/855,003.72 = 347,737.12/x
  3. Step 3: Cross multiply
    619,709.20x = 855,003.72 × 347,737.12
  4. Step 4: Simplify right side
    619,709.20x = 297,316,531,182.09
  5. Step 5: Solve for x
    x = 297,316,531,182.09/619,709.20
  6. Step 6: Final answer
    x = 479,767.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.